MERCURY Cited Links API

openapi: 3.2.0
info:
  title: MERCURY x402 storefront Cited Links 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-links
paths:
  /buy/links:
    get:
      summary: MERCURY Cited Links
      description: 'URL → a SIGNED outbound/internal link graph: every as an absolute URL + anchor text, classified internal vs external against the page origin, grouped by origin with a third-party-origin histogram (privacy-audit) and same/cross-origin counts (SEO). Deterministic — same page bytes ⇒ byte-identical graph; no LLM. Covers hyperlinks only (not rel/asset tags). Receipt = EIP-191 over the graph.'
      operationId: buy_cited_links
      tags:
      - cited-links
      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 (still delivered)
                  url:
                    type: string
                    description: final URL after redirects (the graph origin)
                  status:
                    type: integer
                    description: upstream HTTP status
                  data:
                    type: object
                    description: the structured link graph (the product the buyer consumes)
                    properties:
                      pageOrigin:
                        type: string
                        description: scheme://host of the final page — the reference origin
                      total:
                        type: integer
                        description: number of unique outbound <a href> links
                      internalCount:
                        type: integer
                        description: links to the same registrable host (www-insensitive)
                      externalCount:
                        type: integer
                        description: links to a different host
                      originCount:
                        type: integer
                        description: number of distinct link origins
                      links:
                        type: array
                        description: 'every link: absolute url, anchor text, its origin, and internal/external'
                        items:
                          type: object
                          properties:
                            url:
                              type: string
                            text:
                              type: string
                              description: anchor text (may be empty for image/icon links)
                            origin:
                              type: string
                              description: scheme://host of this link
                            internal:
                              type: boolean
                              description: true if same registrable host as the page
                      byOrigin:
                        type: array
                        description: links grouped by origin, descending by count (SEO + competitor map)
                        items:
                          type: object
                          properties:
                            origin:
                              type: string
                            count:
                              type: integer
                            internal:
                              type: boolean
                      thirdPartyOrigins:
                        type: array
                        description: distinct EXTERNAL origins only — the privacy-audit / data-leak surface
                        items:
                          type: string
                  text:
                    type: string
                    description: canonical newline string the signed receipt covers (one `text\turl` row per link, origin-sorted)
                  contentType:
                    type: string
                  fetchedAt:
                    type: string
                    description: ISO8601 fetch time (in the signed payload)
                  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 map (http/https)
        description: the page to map (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