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OpenAPI Specification

openapi: 3.2.0
info:
  title: Glyph Payment API
  description: 'A language for agents: encode content into the cheapest substrate the reading model can parse, with honest per-reader token math. Fillin is the retrieval product — a time-series index of the dev internet that closes the gap between an LLM''s training cutoff and now.'
  version: 0.1.0
tags:
- name: Payment
paths:
  /v1/payment/account/{address}:
    get:
      summary: Payment Account
      operationId: payment_account_v1_payment_account__address__get
      parameters:
      - name: address
        in: path
        required: true
        schema:
          type: string
          title: Address
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Payment
  /v1/payment/transactions/{address}:
    get:
      summary: Payment Transactions
      description: 'Return on-chain USDC deposits seen by the monitor for `address`.


        Public — addresses and tx hashes are public. Lets a paying agent verify

        its top-up landed before retrying a /query, and gives operators an audit

        surface that doesn''t require shell access to the SQLite ledger.'
      operationId: payment_transactions_v1_payment_transactions__address__get
      parameters:
      - name: address
        in: path
        required: true
        schema:
          type: string
          title: Address
      - name: limit
        in: query
        required: false
        schema:
          type: integer
          default: 50
          title: Limit
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Payment
  /v1/payment/challenge:
    post:
      summary: Payment Challenge
      description: 'Mint a one-shot signing challenge. Required before every paid /query.


        The returned `message` is what the client''s wallet must sign with EIP-191

        personal_sign. The signature + this nonce prove the caller controls the

        private key for `address` and cannot be spoofed by a third party.'
      operationId: payment_challenge_v1_payment_challenge_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ChallengeIn'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Payment
  /v1/payment/info:
    get:
      summary: Payment Info
      description: 'x402-style payment discovery. Unauthed: clients need this to pay.


        Mirrors GLYPH''s /v1/payment/info contract so agents that already speak

        the GLYPH wallet handshake can pay Fillin the same way. When the server

        advertises multiple chains (FILLIN_NETWORKS), `networks` enumerates them

        all; the top-level `network`/`usdc_contract` remain set to the primary

        chain for clients that haven''t been updated to read the list.'
      operationId: payment_info_v1_payment_info_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
      tags:
      - Payment
components:
  schemas:
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    ChallengeIn:
      properties:
        address:
          type: string
          maxLength: 42
          minLength: 42
          title: Address
      type: object
      required:
      - address
      title: ChallengeIn
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
  securitySchemes:
    HTTPBearer:
      type: http
      scheme: bearer