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OpenAPI Specification
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.'