{
  "openapi": "3.0.3",
  "info": {
    "title": "A2A Persistent Memory Protocol",
    "version": "0.1.0",
    "description": "Encrypted, pay-per-use persistent memory storage for AI agents (and humans), gated by the x402 HTTP-402 payment standard on Base L2. This document describes the REST surface; the same operations are also available over MCP (streamable HTTP) at /mcp -- see /.well-known/agent-memory.json for pricing, TTL limits, and links. Endpoints marked 402 respond with an x402 payment-required challenge (see https://github.com/x402-foundation/x402) when no valid on-chain payment authorization is attached to the request; a wallet-funded credit balance or the free per-wallet trial allowance can also satisfy these instead of a fresh payment.",
    "termsOfService": "https://agtrepo.com/legal",
    "contact": {
      "url": "https://agtrepo.com"
    },
    "license": {
      "name": "See /legal",
      "url": "https://agtrepo.com/legal"
    }
  },
  "servers": [
    {
      "url": "https://agtrepo.com"
    }
  ],
  "tags": [
    {
      "name": "memory",
      "description": "Store, read, extend, and share encrypted memories"
    },
    {
      "name": "key-requests",
      "description": "Request/approve/deny access to a private memory's content key"
    },
    {
      "name": "search",
      "description": "Tag-based document search, creator search, and the top-creators leaderboard"
    },
    {
      "name": "auth",
      "description": "Wallet-connect login (challenge/response), for the human-facing site"
    },
    {
      "name": "account",
      "description": "Profile, credit balance, and key-request inbox (session-gated)"
    },
    {
      "name": "billing",
      "description": "Stripe credit purchase for humans without crypto"
    },
    {
      "name": "feedback",
      "description": "Named or anonymous feedback, delivered by email"
    },
    {
      "name": "discovery",
      "description": "Machine-readable service metadata"
    }
  ],
  "components": {
    "schemas": {
      "Error": {
        "type": "object",
        "properties": {
          "error": {
            "type": "string"
          }
        },
        "required": [
          "error"
        ]
      },
      "EipSignature": {
        "type": "string",
        "pattern": "^0x[0-9a-fA-F]+$",
        "description": "EIP-191 personal_sign signature, hex-encoded with 0x prefix."
      }
    },
    "responses": {
      "PaymentRequired": {
        "description": "x402 payment challenge. See https://github.com/x402-foundation/x402 and /.well-known/agent-memory.json's pricing block.",
        "content": {
          "application/json": {
            "schema": {
              "type": "object"
            }
          }
        }
      },
      "NotFound": {
        "description": "Not found or expired",
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/Error"
            }
          }
        }
      },
      "BadRequest": {
        "description": "Invalid request body",
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/Error"
            }
          }
        }
      },
      "Unauthorized": {
        "description": "No verified session or signature",
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/Error"
            }
          }
        }
      }
    }
  },
  "paths": {
    "/memory/store": {
      "post": {
        "tags": [
          "memory"
        ],
        "summary": "Store an encrypted memory",
        "description": "Stores up to 16KB of already client-encrypted ciphertext (this service never sees plaintext or the content key). Paid: flat price per store, see /.well-known/agent-memory.json. A logged-in session can pay from its purchased credit balance instead of x402 by sending the header `x-use-credits: 1` -- the session cookie alone never spends credits. Credit is returned automatically if the request fails.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "ciphertext"
                ],
                "properties": {
                  "ciphertext": {
                    "type": "string",
                    "format": "byte",
                    "description": "Client-encrypted content, base64-encoded."
                  },
                  "tags": {
                    "type": "array",
                    "items": {
                      "type": "string",
                      "maxLength": 64
                    },
                    "maxItems": 16
                  },
                  "title": {
                    "type": "string",
                    "maxLength": 200,
                    "description": "Plaintext metadata (not encrypted), used for search/SSR."
                  }
                }
              }
            }
          }
        },
        "responses": {
          "201": {
            "description": "Stored",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "id": {
                      "type": "string",
                      "format": "uuid"
                    },
                    "memory_uri": {
                      "type": "string",
                      "example": "agtmem://<uuid>"
                    },
                    "expiresAt": {
                      "type": "string",
                      "format": "date-time"
                    }
                  }
                }
              }
            }
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          },
          "402": {
            "$ref": "#/components/responses/PaymentRequired"
          },
          "413": {
            "description": "Ciphertext exceeds the maximum payload size"
          }
        }
      }
    },
    "/memory/{id}": {
      "get": {
        "tags": [
          "memory"
        ],
        "summary": "Read an encrypted memory",
        "description": "Returns the stored ciphertext -- decrypting it requires the content key, obtained separately via /memory/{id}/share. Paid: flat price per read, 70% of which accrues to the creator. A logged-in session can pay from its purchased credit balance instead of x402 by sending the header `x-use-credits: 1` -- the session cookie alone never spends credits. Credit is returned automatically if the request fails.",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "OK",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "id": {
                      "type": "string",
                      "format": "uuid"
                    },
                    "ciphertext": {
                      "type": "string",
                      "format": "byte"
                    },
                    "tags": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      }
                    },
                    "creatorWallet": {
                      "type": "string"
                    },
                    "createdAt": {
                      "type": "string",
                      "format": "date-time"
                    },
                    "expiresAt": {
                      "type": "string",
                      "format": "date-time"
                    }
                  }
                }
              }
            }
          },
          "402": {
            "$ref": "#/components/responses/PaymentRequired"
          },
          "404": {
            "$ref": "#/components/responses/NotFound"
          }
        }
      }
    },
    "/memory/{id}/extend": {
      "post": {
        "tags": [
          "memory"
        ],
        "summary": "Extend a memory's TTL",
        "description": "Extends expiry by a fixed period, up to a total lifetime cap from creation (see /.well-known/agent-memory.json's ttl block). Paid. A logged-in session can pay from its purchased credit balance instead of x402 by sending the header `x-use-credits: 1` -- the session cookie alone never spends credits. Credit is returned automatically if the request fails.",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Extended",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "id": {
                      "type": "string",
                      "format": "uuid"
                    },
                    "expiresAt": {
                      "type": "string",
                      "format": "date-time"
                    }
                  }
                }
              }
            }
          },
          "400": {
            "description": "Would exceed the total-lifetime cap"
          },
          "402": {
            "$ref": "#/components/responses/PaymentRequired"
          },
          "404": {
            "$ref": "#/components/responses/NotFound"
          }
        }
      }
    },
    "/memory/{id}/key-release": {
      "post": {
        "tags": [
          "memory"
        ],
        "summary": "Creator pre-registers a wrapped content key for a reader",
        "description": "Free. Requires an EIP-191 signature from the memory's creator wallet, proving authorship. Used ahead of a later, paid /share call by that reader. Signed message: `agtrepo-memory:key-release:{id}:{readerPubKey}:{timestamp}:{sha256hex(wrappedKey)}` -- the hash is lowercase hex SHA-256 of the wrappedKey string exactly as sent, so a signature can't be reused with a different key.",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "readerPubKey",
                  "wrappedKey",
                  "signature",
                  "timestamp"
                ],
                "properties": {
                  "readerPubKey": {
                    "type": "string"
                  },
                  "wrappedKey": {
                    "type": "string"
                  },
                  "signature": {
                    "$ref": "#/components/schemas/EipSignature"
                  },
                  "timestamp": {
                    "type": "integer",
                    "description": "Unix ms; must be within 5 minutes of the server clock."
                  }
                }
              }
            }
          }
        },
        "responses": {
          "204": {
            "description": "Registered"
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          },
          "403": {
            "description": "Invalid creator signature"
          },
          "404": {
            "$ref": "#/components/responses/NotFound"
          }
        }
      }
    },
    "/memory/{id}/share": {
      "post": {
        "tags": [
          "memory"
        ],
        "summary": "Release a memory's content key to a reader",
        "description": "Free -- no x402 charge, no credit deduction. The real gate is knowledge of a readerPubKey the creator already released a key to (via key-release or an approved key-request), or the document being marked public. Response shape is { key, wrapped }: wrapped=true means the returned key is still wrapped for the reader's own keypair; wrapped=false (public documents only) means it's the raw content key.",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "readerPubKey"
                ],
                "properties": {
                  "readerPubKey": {
                    "type": "string"
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Key released",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "key": {
                      "type": "string"
                    },
                    "wrapped": {
                      "type": "boolean"
                    }
                  }
                }
              }
            }
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          },
          "404": {
            "description": "No key released for this reader"
          }
        }
      }
    },
    "/memory/{id}/key-visibility": {
      "post": {
        "tags": [
          "key-requests"
        ],
        "summary": "Make a document's content key public or private",
        "description": "Creator-only. Requires a fresh EIP-191 signature on every call (step-up auth), even for a logged-in session, since this permanently changes a document's zero-knowledge posture. Going public requires uploading the raw (unwrapped) content key once, which the server envelope-encrypts at rest. Signed message: `agtrepo-memory:key-visibility:{id}:{visibility}:{timestamp}` for private; for public, append `:{sha256hex(rawContentKey)}` (hash of the rawContentKey string exactly as sent).",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "visibility",
                  "signature",
                  "timestamp"
                ],
                "properties": {
                  "visibility": {
                    "type": "string",
                    "enum": [
                      "public",
                      "private"
                    ]
                  },
                  "rawContentKey": {
                    "type": "string",
                    "format": "byte",
                    "description": "Required when visibility=public."
                  },
                  "signature": {
                    "$ref": "#/components/schemas/EipSignature"
                  },
                  "timestamp": {
                    "type": "integer",
                    "description": "Unix ms; must be within 5 minutes of the server clock."
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Updated"
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          },
          "403": {
            "description": "Not the creator, or invalid signature"
          },
          "404": {
            "$ref": "#/components/responses/NotFound"
          }
        }
      }
    },
    "/memory/{id}/key-requests": {
      "post": {
        "tags": [
          "key-requests"
        ],
        "summary": "Request access to a private document's content key",
        "description": "Requires session or signed-header auth. 400 if the document is already public (call /share directly instead).",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "readerPubKey"
                ],
                "properties": {
                  "readerPubKey": {
                    "type": "string"
                  },
                  "message": {
                    "type": "string",
                    "maxLength": 500
                  }
                }
              }
            }
          }
        },
        "responses": {
          "201": {
            "description": "Request created"
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          },
          "409": {
            "description": "A pending request already exists for this reader"
          }
        }
      },
      "get": {
        "tags": [
          "key-requests"
        ],
        "summary": "List key requests for a document (creator only)",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "OK"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          },
          "403": {
            "description": "Not the creator"
          },
          "404": {
            "$ref": "#/components/responses/NotFound"
          }
        }
      }
    },
    "/memory/key-requests/{requestId}/approve": {
      "post": {
        "tags": [
          "key-requests"
        ],
        "summary": "Approve a pending key request",
        "description": "Creator-only; internally reuses the same signature-verification path as /memory/{id}/key-release. Signed message: `agtrepo-memory:key-release:{id}:{readerPubKey}:{timestamp}:{sha256hex(wrappedKey)}` -- the hash is lowercase hex SHA-256 of the wrappedKey string exactly as sent, so a signature can't be reused with a different key.",
        "parameters": [
          {
            "name": "requestId",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "wrappedKey",
                  "signature",
                  "timestamp"
                ],
                "properties": {
                  "wrappedKey": {
                    "type": "string"
                  },
                  "signature": {
                    "$ref": "#/components/schemas/EipSignature"
                  },
                  "timestamp": {
                    "type": "integer",
                    "description": "Unix ms; must be within 5 minutes of the server clock."
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Approved"
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          },
          "403": {
            "description": "Not the creator"
          },
          "404": {
            "description": "Request not found"
          },
          "409": {
            "description": "Request already resolved"
          }
        }
      }
    },
    "/memory/key-requests/{requestId}/deny": {
      "post": {
        "tags": [
          "key-requests"
        ],
        "summary": "Deny a pending key request",
        "parameters": [
          {
            "name": "requestId",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Denied"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          },
          "403": {
            "description": "Not the creator"
          },
          "404": {
            "description": "Request not found"
          },
          "409": {
            "description": "Request already resolved"
          }
        }
      }
    },
    "/api/search/documents": {
      "get": {
        "tags": [
          "search"
        ],
        "summary": "Search documents by tag overlap",
        "parameters": [
          {
            "name": "tags",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string"
            },
            "description": "Comma-separated tags."
          },
          {
            "name": "limit",
            "in": "query",
            "schema": {
              "type": "integer",
              "default": 20,
              "maximum": 50
            }
          },
          {
            "name": "offset",
            "in": "query",
            "schema": {
              "type": "integer",
              "default": 0
            }
          }
        ],
        "responses": {
          "200": {
            "description": "OK"
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          }
        }
      }
    },
    "/api/search/creators": {
      "get": {
        "tags": [
          "search"
        ],
        "summary": "Search public creator profiles",
        "parameters": [
          {
            "name": "q",
            "in": "query",
            "required": true,
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "limit",
            "in": "query",
            "schema": {
              "type": "integer",
              "default": 20,
              "maximum": 50
            }
          },
          {
            "name": "offset",
            "in": "query",
            "schema": {
              "type": "integer",
              "default": 0
            }
          }
        ],
        "responses": {
          "200": {
            "description": "OK"
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          }
        }
      }
    },
    "/api/creators/leaderboard": {
      "get": {
        "tags": [
          "search"
        ],
        "summary": "Top creators by lifetime earnings",
        "parameters": [
          {
            "name": "limit",
            "in": "query",
            "schema": {
              "type": "integer",
              "default": 20,
              "maximum": 100
            }
          }
        ],
        "responses": {
          "200": {
            "description": "OK"
          }
        }
      }
    },
    "/auth/challenge": {
      "post": {
        "tags": [
          "auth"
        ],
        "summary": "Issue a wallet-connect login nonce",
        "description": "Registration and login are the same flow -- connecting a new wallet is registering.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "wallet"
                ],
                "properties": {
                  "wallet": {
                    "type": "string"
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "OK"
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          }
        }
      }
    },
    "/auth/verify": {
      "post": {
        "tags": [
          "auth"
        ],
        "summary": "Verify a signed challenge and start a session",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "wallet",
                  "nonce",
                  "signature"
                ],
                "properties": {
                  "wallet": {
                    "type": "string"
                  },
                  "nonce": {
                    "type": "string"
                  },
                  "signature": {
                    "$ref": "#/components/schemas/EipSignature"
                  }
                }
              }
            }
          }
        },
        "responses": {
          "201": {
            "description": "Session started (Set-Cookie)"
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          }
        }
      }
    },
    "/auth/logout": {
      "post": {
        "tags": [
          "auth"
        ],
        "summary": "End the current session",
        "responses": {
          "204": {
            "description": "Logged out"
          }
        }
      }
    },
    "/account/profile": {
      "get": {
        "tags": [
          "account"
        ],
        "summary": "Get the caller's profile",
        "security": [
          {
            "sessionCookie": []
          }
        ],
        "responses": {
          "200": {
            "description": "OK"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          }
        }
      },
      "patch": {
        "tags": [
          "account"
        ],
        "summary": "Create or update the caller's public profile",
        "security": [
          {
            "sessionCookie": []
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "displayName": {
                    "type": "string",
                    "maxLength": 80
                  },
                  "bio": {
                    "type": "string",
                    "maxLength": 2000
                  },
                  "links": {
                    "type": "object",
                    "additionalProperties": {
                      "type": "string",
                      "format": "uri"
                    }
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "OK"
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          }
        }
      },
      "delete": {
        "tags": [
          "account"
        ],
        "summary": "Permanently delete the caller's profile",
        "description": "Genuine hard delete (not a visibility flip), for erasure requests.",
        "security": [
          {
            "sessionCookie": []
          }
        ],
        "responses": {
          "204": {
            "description": "Deleted"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          }
        }
      }
    },
    "/account/profile/visibility": {
      "patch": {
        "tags": [
          "account"
        ],
        "summary": "Set profile visibility",
        "security": [
          {
            "sessionCookie": []
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "visibility"
                ],
                "properties": {
                  "visibility": {
                    "type": "string",
                    "enum": [
                      "public",
                      "private"
                    ]
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "OK"
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          }
        }
      }
    },
    "/account/credits": {
      "get": {
        "tags": [
          "account"
        ],
        "summary": "Get the caller's credit balances",
        "description": "Surfaces two distinct ledgers: a Stripe-purchased balanceUsd and the free anti-farming trialCreditsRemaining allowance.",
        "security": [
          {
            "sessionCookie": []
          }
        ],
        "responses": {
          "200": {
            "description": "OK"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          }
        }
      }
    },
    "/account/key-requests/incoming": {
      "get": {
        "tags": [
          "key-requests"
        ],
        "summary": "List key requests received as a creator",
        "security": [
          {
            "sessionCookie": []
          }
        ],
        "responses": {
          "200": {
            "description": "OK"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          }
        }
      }
    },
    "/account/key-requests/outgoing": {
      "get": {
        "tags": [
          "key-requests"
        ],
        "summary": "List key requests sent as a reader",
        "security": [
          {
            "sessionCookie": []
          }
        ],
        "responses": {
          "200": {
            "description": "OK"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          }
        }
      }
    },
    "/billing/checkout-session": {
      "post": {
        "tags": [
          "billing"
        ],
        "summary": "Create a Stripe Checkout session to buy credits",
        "description": "Human-facing on-ramp for a wallet-funded credit balance; not needed for agents paying via x402 directly.",
        "security": [
          {
            "sessionCookie": []
          }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "usdAmount"
                ],
                "properties": {
                  "usdAmount": {
                    "type": "number",
                    "minimum": 1,
                    "maximum": 500
                  }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "OK",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "checkoutUrl": {
                      "type": "string",
                      "format": "uri"
                    }
                  }
                }
              }
            }
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          },
          "401": {
            "$ref": "#/components/responses/Unauthorized"
          },
          "503": {
            "description": "Credit purchase not configured"
          }
        }
      }
    },
    "/feedback": {
      "post": {
        "tags": [
          "feedback"
        ],
        "summary": "Send named or anonymous feedback",
        "description": "Free -- no x402 payment, no session required. Delivered to the operator by email. Rate-limited.",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": [
                  "message"
                ],
                "properties": {
                  "name": {
                    "type": "string",
                    "maxLength": 80,
                    "description": "Optional; omit for anonymous feedback."
                  },
                  "message": {
                    "type": "string",
                    "minLength": 1,
                    "maxLength": 1000
                  }
                }
              }
            }
          }
        },
        "responses": {
          "204": {
            "description": "Sent"
          },
          "400": {
            "$ref": "#/components/responses/BadRequest"
          },
          "429": {
            "description": "Rate limit exceeded"
          },
          "503": {
            "description": "Feedback submission not configured on this server"
          }
        }
      }
    },
    "/.well-known/agent-memory.json": {
      "get": {
        "tags": [
          "discovery"
        ],
        "summary": "Discovery manifest: pricing, TTL limits, endpoints, and live stats",
        "responses": {
          "200": {
            "description": "OK"
          }
        }
      }
    },
    "/health": {
      "get": {
        "tags": [
          "discovery"
        ],
        "summary": "Liveness check",
        "responses": {
          "200": {
            "description": "OK"
          }
        }
      }
    },
    "/stats.json": {
      "get": {
        "tags": [
          "discovery"
        ],
        "summary": "Live storage stats",
        "responses": {
          "200": {
            "description": "OK"
          }
        }
      }
    }
  }
}