openapi: 3.2.0
info:
  title: 2s — the (most) everything Search API
  version: '1'
  summary: The (most) everything API.
  description: 'The (most) everything API for AI agents: 575+ pay-per-call endpoints on one origin.'
  contact:
    name: 2s
    url: https://2s.io
    email: alley@2s.io
  x-logo:
    url: https://2s.io/icon-512.png
    altText: 2s
  x-guidance: 'Pay-per-call REST API for AI agents — hundreds of endpoints returning ground-truth data (US public records, company & legal identifiers, finance/SEC, crypto/web3, security & CVEs, medical codes, weather & geocoding, agriculture, energy, maritime, music, and more). Every endpoint is paid per call in USDC via x402 (Base or Solana) — no API key, no signup. Call any endpoint with no auth to get a 402 PaymentRequirements envelope, sign it (EIP-3009 on Base, partial SPL transfer on Solana), and retry with the PAYMENT-SIGNATURE header. Add ?trial=1 for one free real call per endpoint per hour to test before paying. To discover the right endpoint: GET https://2s.io/api/directory for the full catalog, or GET https://2s.io/api/search/endpoints?q=<natural-language task> for a ranked match. Per-call price is on each operation as x-payment-info (from $0.001). Batch up to 50 calls behind one payment via POST https://2s.io/api/batch/run.'
servers:
- url: https://2s.io
tags:
- name: Search
paths:
  /api/search/ai:
    get:
      tags:
      - Search
      summary: AI web search optimized for agents
      description: AI web search optimized for agents. Returns ranked results with the relevant extracted content of each page (not just a link + blurb), plus a relevance score. topic=news for recent reporting. Distinct from search.web (raw SERP) — this returns clean, LLM-ready page content per result.
      operationId: search_ai
      deprecated: false
      security:
      - x402Payment: []
      responses:
        '200':
          description: 'Normalized: items = ranked results with extracted content.'
          content:
            application/json:
              schema:
                type: object
                required:
                - data
                - meta
                properties:
                  data:
                    type: object
                    properties:
                      ok:
                        type: boolean
                        enum:
                        - true
                      items:
                        type: array
                        items:
                          type: object
                          properties:
                            title:
                              type: string
                              nullable: true
                            url:
                              type: string
                              nullable: true
                            content:
                              type: string
                              nullable: true
                            score:
                              type: number
                              nullable: true
                          required:
                          - title
                          - url
                          - content
                          - score
                          additionalProperties: false
                      total:
                        type: integer
                        nullable: true
                        description: Total matching rows upstream; null when unknown.
                      source:
                        $ref: '#/components/schemas/Source'
                    required:
                    - ok
                    - items
                    - total
                    - source
                    additionalProperties: false
                  meta:
                    $ref: '#/components/schemas/CallMeta'
        '400':
          $ref: '#/components/responses/BadRequest'
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '405':
          $ref: '#/components/responses/MethodNotAllowed'
        '500':
          $ref: '#/components/responses/ServerError'
        '502':
          $ref: '#/components/responses/UpstreamError'
      x-2s-id: search.ai
      x-2s-version: null
      x-2s-price:
        usd: 0.045
      x-2s-accepts:
      - x402
      x-2s-response-shape: normalized
      x-payment-info:
        price:
          mode: fixed
          currency: USD
          amount: '0.045000'
        protocols:
        - x402: {}
      parameters:
      - name: q
        in: query
        required: true
        description: Search query.
        schema:
          type: string
          minLength: 2
          maxLength: 400
      - name: maxResults
        in: query
        required: false
        description: Max results.
        schema:
          type: integer
          minimum: 1
          maximum: 10
      - name: topic
        in: query
        required: false
        description: Topic.
        schema:
          type: string
          enum:
          - general
          - news
      - $ref: '#/components/parameters/TrialMode'
  /api/search/crawl:
    post:
      tags:
      - Search
      summary: Crawl a site and return clean page content
      description: Crawl a site and return clean page content. POST { url, limit?, maxDepth?, instructions? }. Follows links from the start URL (up to 10 pages, depth ≤2) and returns each page's extracted content. Optional natural-language instructions steer which pages to follow (e.g. "only pricing and docs pages"). For ingesting a small site/section in one call.
      operationId: search_crawl
      deprecated: false
      security:
      - x402Payment: []
      responses:
        '200':
          description: 'Normalized: items = crawled pages with content; meta.baseUrl = start URL.'
          content:
            application/json:
              schema:
                type: object
                required:
                - data
                - meta
                properties:
                  data:
                    type: object
                    properties:
                      ok:
                        type: boolean
                        enum:
                        - true
                      items:
                        type: array
                        items:
                          type: object
                          properties:
                            url:
                              type: string
                              nullable: true
                            content:
                              type: string
                              nullable: true
                          required:
                          - url
                          - content
                          additionalProperties: false
                      total:
                        type: integer
                        nullable: true
                        description: Total matching rows upstream; null when unknown.
                      source:
                        $ref: '#/components/schemas/Source'
                      meta:
                        type: object
                        properties:
                          baseUrl:
                            type: string
                        required:
                        - baseUrl
                        additionalProperties: false
                    required:
                    - ok
                    - items
                    - total
                    - source
                    additionalProperties: false
                  meta:
                    $ref: '#/components/schemas/CallMeta'
        '400':
          $ref: '#/components/responses/BadRequest'
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '405':
          $ref: '#/components/responses/MethodNotAllowed'
        '500':
          $ref: '#/components/responses/ServerError'
        '502':
          $ref: '#/components/responses/UpstreamError'
      x-2s-id: search.crawl
      x-2s-version: null
      x-2s-price:
        usd: 0.12
      x-2s-accepts:
      - x402
      x-2s-response-shape: normalized
      x-payment-info:
        price:
          mode: fixed
          currency: USD
          amount: '0.120000'
        protocols:
        - x402: {}
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                url:
                  type: string
                  format: uri
                  maxLength: 2048
                  description: Start URL to crawl.
                limit:
                  type: integer
                  minimum: 1
                  maximum: 10
                  description: Max pages (≤10).
                maxDepth:
                  type: integer
                  minimum: 1
                  maximum: 2
                  description: Max depth.
                instructions:
                  type: string
                  maxLength: 300
                  description: Natural-language steering for which pages to follow.
              required:
              - url
              additionalProperties: false
      parameters:
      - $ref: '#/components/parameters/TrialMode'
  /api/search/endpoints:
    get:
      tags:
      - Search
      summary: Find the right 2s endpoint for a task using natural language
      description: Find the right 2s endpoint for a task using natural language. Pass q (e.g. 'check if a domain can be spoofed', 'is this CVE being exploited', 'screen a company for sanctions', 'decode a VIN') and get back the catalog's most relevant endpoints, ranked, each with its id, API path, method, group, description, and price. Deterministic keyword + synonym matching over the live endpoint registry (no LLM, no external calls) — a self-routing index so an agent (or its planner) can discover which paid call answers a question instead of reading the whole 290+ endpoint catalog. Returns the path you then call directly.
      operationId: search_endpoints
      deprecated: false
      security:
      - x402Payment: []
      responses:
        '200':
          description: 'Normalized envelope: items = ranked matching endpoints (call the .path directly); meta.total = total matches.'
          content:
            application/json:
              schema:
                type: object
                required:
                - data
                - meta
                properties:
                  data:
                    type: object
                    properties:
                      ok:
                        type: boolean
                        enum:
                        - true
                      items:
                        type: array
                        items:
                          type: object
                          properties:
                            id:
                              type: string
                            path:
                              type: string
                            method:
                              type: string
                            group:
                              type: string
                            name:
                              type: string
                            description:
                              type: string
                            priceUsd:
                              type: number
                            score:
                              type: number
                          required:
                          - id
                          - path
                          - method
                          - group
                          - name
                          - description
                          - priceUsd
                          - score
                          additionalProperties: false
                      total:
                        type: integer
                        nullable: true
                        description: Total matching rows upstream; null when unknown.
                      source:
                        $ref: '#/components/schemas/Source'
                      meta:
                        type: object
                        properties:
                          query:
                            type: string
                          total:
                            type: integer
                        required:
                        - query
                        - total
                        additionalProperties: false
                    required:
                    - ok
                    - items
                    - total
                    - source
                    additionalProperties: false
                  meta:
                    $ref: '#/components/schemas/CallMeta'
        '400':
          $ref: '#/components/responses/BadRequest'
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '405':
          $ref: '#/components/responses/MethodNotAllowed'
        '500':
          $ref: '#/components/responses/ServerError'
        '502':
          $ref: '#/components/responses/UpstreamError'
      x-2s-id: search.endpoints
      x-2s-version: null
      x-2s-price:
        usd: 0.0025
      x-2s-accepts:
      - x402
      x-2s-response-shape: normalized
      x-payment-info:
        price:
          mode: fixed
          currency: USD
          amount: '0.002500'
        protocols:
        - x402: {}
      parameters:
      - name: q
        in: query
        required: true
        description: Free-text search query.
        schema:
          type: string
          minLength: 2
          maxLength: 200
      - name: limit
        in: query
        required: false
        description: Maximum number of results to return.
        schema:
          type: integer
          minimum: 1
          maximum: 50
      - $ref: '#/components/parameters/TrialMode'
  /api/search/extract:
    post:
      tags:
      - Search
      summary: Extract clean, LLM-ready content from up to 5 URLs in one call
      description: Extract clean, LLM-ready content from up to 5 URLs in one call. POST { urls[], depth? }. Returns the main text content of each page (JS-rendered, boilerplate stripped) plus a list of any URLs that failed. For feeding web pages to an agent without running your own headless browser.
      operationId: search_extract
      deprecated: false
      security:
      - x402Payment: []
      responses:
        '200':
          description: 'Normalized: items = extracted pages; meta.failed = URLs that could not be extracted.'
          content:
            application/json:
              schema:
                type: object
                required:
                - data
                - meta
                properties:
                  data:
                    type: object
                    properties:
                      ok:
                        type: boolean
                        enum:
                        - true
                      items:
                        type: array
                        items:
                          type: object
                          properties:
                            url:
                              type: string
                              nullable: true
                            content:
                              type: string
                              nullable: true
                          required:
                          - url
                          - content
                          additionalProperties: false
                      total:
                        type: integer
                        nullable: true
                        description: Total matching rows upstream; null when unknown.
                      source:
                        $ref: '#/components/schemas/Source'
                      meta:
                        type: object
                        properties:
                          failed:
                            type: array
                            items: {}
                        required:
                        - failed
                        additionalProperties: false
                    required:
                    - ok
                    - items
                    - total
                    - source
                    additionalProperties: false
                  meta:
                    $ref: '#/components/schemas/CallMeta'
        '400':
          $ref: '#/components/responses/BadRequest'
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '405':
          $ref: '#/components/responses/MethodNotAllowed'
        '500':
          $ref: '#/components/responses/ServerError'
        '502':
          $ref: '#/components/responses/UpstreamError'
      x-2s-id: search.extract
      x-2s-version: null
      x-2s-price:
        usd: 0.045
      x-2s-accepts:
      - x402
      x-2s-response-shape: normalized
      x-payment-info:
        price:
          mode: fixed
          currency: USD
          amount: '0.045000'
        protocols:
        - x402: {}
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                urls:
                  type: array
                  items:
                    type: string
                    format: uri
                    maxLength: 2048
                  minItems: 1
                  maxItems: 5
                  description: 1-5 URLs to extract.
                depth:
                  type: string
                  enum:
                  - basic
                  - advanced
                  description: Depth.
              required:
              - urls
              additionalProperties: false
      parameters:
      - $ref: '#/components/parameters/TrialMode'
  /api/search/web:
    get:
      tags:
      - Search
      summary: Live web search. Returns ranked results with title, URL
      description: Live web search. Returns ranked results with title, URL, snippet description, site name, and page age — fresh information past any model training cutoff. Supports count (1-20), offset for paging, country (2-letter, e.g. US), freshness (pd=past day, pw=past week, pm=past month, py=past year, or a YYYY-MM-DDtoYYYY-MM-DD range), and safesearch (off/moderate/strict). Use for current events, fact verification, finding documentation, and research. Independent search index. For news-specific results with sources and timestamps see /api/news/search.
      operationId: search_web
      deprecated: false
      security:
      - x402Payment: []
      responses:
        '200':
          description: 'Normalized envelope: items = ranked live web results (title, url, snippet, site, age); total = null (Brave reports no count); meta.query echoes the search, meta.moreAvailable signals another offset page.'
          content:
            application/json:
              schema:
                type: object
                required:
                - data
                - meta
                properties:
                  data:
                    type: object
                    properties:
                      ok:
                        type: boolean
                        enum:
                        - true
                      items:
                        type: array
                        items:
                          type: object
                          properties:
                            title:
                              type: string
                            url:
                              type: string
                            description:
                              type: string
                              nullable: true
                            siteName:
                              type: string
                              nullable: true
                            age:
                              type: string
                              nullable: true
                              description: Relative page age when known, e.g. "2 days ago".
                            language:
                              type: string
                              nullable: true
                          required:
                          - title
                          - url
                          - description
                          - siteName
                          - age
                          - language
                          additionalProperties: false
                      total:
                        type: integer
                        nullable: true
                        description: Total matching rows upstream; null when unknown.
                      source:
                        $ref: '#/components/schemas/Source'
                      meta:
                        type: object
                        properties:
                          query:
                            type: string
                          moreAvailable:
                            type: boolean
                            description: True when another offset page exists.
                        required:
                        - query
                        - moreAvailable
                        additionalProperties: false
                    required:
                    - ok
                    - items
                    - total
                    - source
                    additionalProperties: false
                  meta:
                    $ref: '#/components/schemas/CallMeta'
        '400':
          $ref: '#/components/responses/BadRequest'
        '402':
          $ref: '#/components/responses/PaymentRequired'
        '405':
          $ref: '#/components/responses/MethodNotAllowed'
        '500':
          $ref: '#/components/responses/ServerError'
        '502':
          $ref: '#/components/responses/UpstreamError'
      x-2s-id: search.web
      x-2s-version: null
      x-2s-price:
        usd: 0.0225
      x-2s-accepts:
      - x402
      x-2s-response-shape: normalized
      x-payment-info:
        price:
          mode: fixed
          currency: USD
          amount: '0.022500'
        protocols:
        - x402: {}
      parameters:
      - name: q
        in: query
        required: true
        description: Search query.
        schema:
          type: string
          minLength: 1
          maxLength: 400
      - name: count
        in: query
        required: false
        description: Count.
        schema:
          type: integer
          minimum: 1
          maximum: 20
          default: 10
      - name: offset
        in: query
        required: false
        description: Number of results to skip before returning (pagination offset).
        schema:
          type: integer
          minimum: 0
          maximum: 9
          default: 0
      - name: country
        in: query
        required: false
        description: Country name or ISO country code.
        schema:
          type: string
          pattern: ^[a-zA-Z]{2}$
      - name: freshness
        in: query
        required: false
        description: Freshness.
        schema:
          type: string
          pattern: ^(pd|pw|pm|py|\d{4}-\d{2}-\d{2}to\d{4}-\d{2}-\d{2})$
      - name: safesearch
        in: query
        required: false
        description: Safesearch.
        schema:
          type: string
          enum:
          - 'off'
          - moderate
          - strict
      - $ref: '#/components/parameters/TrialMode'
components:
  schemas:
    Source:
      type: object
      description: 'Provenance of the data: upstream provider, source URL, and license.'
      properties:
        provider:
          type: string
          description: Upstream data provider.
        url:
          type: string
          description: Source URL or documentation link.
        license:
          type: string
          description: License / usage terms for the data.
    CallMeta:
      type: object
      description: Per-call meta envelope — endpoint id, cost, caller kind, settlement details.
    X402PaymentRequiredV2:
      type: object
      description: x402 v2 PaymentRequired envelope. Pick any entry from accepts[], sign for that rail, retry with the PAYMENT-SIGNATURE header.
      required:
      - x402Version
      - accepts
      properties:
        x402Version:
          type: integer
          const: 2
        error:
          type: string
          description: Human-readable reason payment is required.
        resource:
          type: string
          description: The resource URL being purchased.
        accepts:
          type: array
          description: Payment requirement options, one per supported network (Base USDC, Solana USDC).
          items:
            type: object
            required:
            - scheme
            - network
            - amount
            - asset
            - payTo
            - maxTimeoutSeconds
            properties:
              scheme:
                type: string
                enum:
                - exact
              network:
                type: string
                description: CAIP-2 network id, e.g. "eip155:8453" (Base) or "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp".
              amount:
                type: string
                description: Price in atomic asset units (USDC has 6 decimals).
              asset:
                type: string
                description: Asset contract address / mint.
              payTo:
                type: string
                description: Treasury address to pay.
              maxTimeoutSeconds:
                type: integer
              extra:
                type: object
                description: 'Rail-specific extras (EVM: EIP-712 domain name/version; Solana: feePayer).'
                additionalProperties: true
        extensions:
          type: object
          description: Optional discovery metadata (e.g. bazaar input/output schemas).
          additionalProperties: true
  responses:
    PaymentRequired:
      description: Payment required. Body contains the x402 PaymentRequirements envelope with a multi-network accepts array; the per-call price is in accepts[].amount (and on the operation as x-2s-price). Sign for whichever rail you hold USDC on (EIP-3009 for Base, partial SPL transfer for Solana) and retry with the PAYMENT-SIGNATURE header (X-PAYMENT also accepted for v1 clients).
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/X402PaymentRequiredV2'
    UpstreamError:
      description: Upstream provider error.
    MethodNotAllowed:
      description: Method not allowed — see `Allow` header for the supported method.
    ServerError:
      description: Internal server error.
    BadRequest:
      description: Bad request — invalid parameters.
  parameters:
    TrialMode:
      name: trial
      in: query
      required: false
      description: 'Try before you buy. Set to 1 for one free real call per endpoint per hour — no wallet or payment needed — to verify the endpoint before paying. Equivalent to sending the "X-2s-Trial: 1" request header. Works on every endpoint.'
      schema:
        type: integer
        enum:
        - 1
  securitySchemes:
    x402Payment:
      type: apiKey
      in: header
      name: PAYMENT-SIGNATURE
      description: 'x402 protocol v2: base64-encoded PaymentPayload. Call any paid endpoint without auth to receive a 402 with a multi-network PaymentRequirements envelope. Sign for either rail: EIP-3009 transferWithAuthorization (Base USDC) OR a partial SPL token transfer (Solana USDC). Retry with PAYMENT-SIGNATURE header. X-PAYMENT is also accepted for v1 buyer clients. See https://x402.org.'