openapi: 3.2.0
info:
  title: MERCURY x402 storefront Cited Markdown API
  version: '1'
  x-spec: mercury-storefront/1
  description: Agent-payable resources over HTTP 402 (x402). LIVE — Base mainnet, real USDC, no token. Only currently-deliverable routes are listed (web-fetch is the live paid SKU; mints are gated off). Free discovery at /.well-known/x402, /x402/discovery, /catalog, and /manifest.
servers:
- url: https://network.mercury-hq.com
tags:
- name: cited-markdown
paths:
  /buy/markdown:
    get:
      summary: MERCURY Cited Markdown
      description: 'URL → clean, LLM-ready markdown (boilerplate/nav/ads stripped, headings + lists + links preserved) with a signed provenance receipt pinning the markdown to its source — the RAG-ingest primitive. Deterministic (no LLM): same URL + same source bytes ⇒ byte-identical markdown.'
      operationId: buy_cited_markdown
      tags:
      - cited-markdown
      responses:
        '200':
          description: Delivered after the x402 payment settles on Base mainnet.
          content:
            application/json:
              schema:
                type: object
                properties:
                  ok:
                    type: boolean
                    description: true on success; false on an honest failure (503-before-charge)
                  url:
                    type: string
                    description: final URL after redirects
                  status:
                    type: integer
                    description: upstream HTTP status
                  text:
                    type: string
                    description: the canonical clean MARKDOWN (the string the signed receipt pins) — boilerplate/nav/ads stripped, headings + lists + links preserved. Identical to data.markdown.
                  fetchedAt:
                    type: string
                    description: ISO-8601 fetch time (also folded into the signed receipt)
                  data:
                    type: object
                    description: the structured deliverable the buyer consumes
                    properties:
                      markdown:
                        type: string
                        description: clean LLM-ready markdown (== text)
                      title:
                        type: string
                        description: page <title> (HTML pages only)
                      wordCount:
                        type: integer
                        description: word count of the markdown (for chunk/cost budgeting)
                      contentType:
                        type: string
                      bytes:
                        type: integer
                        description: raw upstream body size
                      truncated:
                        type: boolean
                        description: true if the markdown hit the 200KB cap
                      redirects:
                        type: array
                        items:
                          type: string
                        description: redirect chain followed
                    additionalProperties: false
                  error:
                    type: string
                    description: present only when ok:false
                required:
                - ok
                - url
                additionalProperties: false
        '402':
          description: Payment Required — retry with an x402-signed payment (e.g. x402-fetch). Terms are in the challenge body (x402 v1).
      parameters:
      - name: url
        in: query
        required: true
        schema:
          type: string
          maxLength: 2048
          description: the page to convert to markdown (http/https)
        description: the page to convert to markdown (http/https)
      x-payment-info:
        protocols:
        - x402
        scheme: exact
        price: $0.005
        currency: USDC
        network: base
        networkCaip2: eip155:8453
        testnet: false
        asset: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
        payTo: '0xe10B9d44e72A29B9c19da02981FFCd875308e3C1'
        facilitator: https://api.cdp.coinbase.com/platform/v2/x402
        x402Version: 1
      x-x402:
        scheme: exact
        price: $0.005
        currency: USDC
        network: base
        networkCaip2: eip155:8453
        asset: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'
        payTo: '0xe10B9d44e72A29B9c19da02981FFCd875308e3C1'
        facilitator: https://api.cdp.coinbase.com/platform/v2/x402
        testnet: false
        maxTimeoutSeconds: 60
x-payment-info:
  protocols:
  - x402
  network: base
  currency: USDC
  payTo: '0xe10B9d44e72A29B9c19da02981FFCd875308e3C1'
  facilitator: https://api.cdp.coinbase.com/platform/v2/x402
  testnet: false
  spec: mercury-storefront/1