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openapi: 3.2.0
info:
title: FastAF AI API
version: v1
contact:
email: support@fastaf.co
url: https://fastaf.co/docs/#x402
description: 'FastAF is a web data API for AI agents: Google SERP, Maps, ecommerce, web scraping, AI extraction, screenshots, news, jobs, research, public profiles and video transcripts. Use prepaid API keys or account-free x402 v2 payments.'
x-guidance: 'Use GET /x402/v1/{endpoint} with query parameters (not POST or a JSON body). Choose serp for Google search, maps for places, news/shopping/scholar/jobs for specialized search, ai for Google AI Mode, amazon/youtube for their resource variants, linkedin/x for public profiles, walmart/zillow/ebay for structured commerce or listings, scrape for public HTML or markdown, and screenshot for images. Use the dedicated zillow and ebay endpoints instead of scrape for those sites. The q and lang aliases are accepted for query (search_query on YouTube) and language. Send a valid unpaid request first; read the x402 v2 PAYMENT-REQUIRED header, sign with an x402 client such as @x402/fetch, and retry the identical URL with PAYMENT-SIGNATURE. USDC payment uses the network and amount in that live challenge; no API-key authentication is needed. Only successful results are settled; inspect PAYMENT-RESPONSE for the receipt. Prices here are decimal USD, while the challenge uses USDC atomic units (six decimals). Dynamic prices depend on advance_search (serp), resource (amazon/youtube), or rendering, proxies/country and AI extraction (scrape). Scrape site defaults, including Booking rendering and Reddit feed mode, are applied before quoting. A bare unsigned URL returns a default-variant discovery quote only: add valid parameters and request a new challenge before paying. Unpaid HEAD probes also return PAYMENT-REQUIRED with no body; use GET, not HEAD, to pay for data. Invalid parameterized requests and blocked targets return 400; payment headers never bypass validation. Never reuse a settled signature for a new call. Respect Retry-After on rate/capacity errors. For the separate prepaid-key API and authenticated credit-pack top-up, see /v1/openapi.json. Get a free API key at https://fastaf.co/signup/ with an email address, terms acceptance and browser verification. No card is required. POST /public/signup sends an email confirmation link and sets a dashboard session cookie; it does not return an API key. Follow the emailed GET /public/signin/{token} link, then create a key in the dashboard (POST /v1/keys with the session cookie). The key is shown only once. Email confirmation unlocks 2 free calls per account in total, not per day, shared across all keys and all offered REST/MCP endpoints, valid for 12 months; failed calls restore their slot. Unverified trial accounts receive email_verification_required (403) before any data call or trial reservation. Signups are limited per IPv4 /24 or IPv6 /64 network per UTC day (default 3); 429 means retry after the reset. GET /v1/usage reports free_requests_remaining separately from balance_credits. POST /v1/signup is retired and always returns 410 signup_disabled. Agents without an inbox can use /x402/v1/{endpoint} without an account.'
x-signup-guidance: Get a free API key at https://fastaf.co/signup/ with an email address, terms acceptance and browser verification. No card is required. POST /public/signup sends an email confirmation link and sets a dashboard session cookie; it does not return an API key. Follow the emailed GET /public/signin/{token} link, then create a key in the dashboard (POST /v1/keys with the session cookie). The key is shown only once. Email confirmation unlocks 2 free calls per account in total, not per day, shared across all keys and all offered REST/MCP endpoints, valid for 12 months; failed calls restore their slot. Unverified trial accounts receive email_verification_required (403) before any data call or trial reservation. Signups are limited per IPv4 /24 or IPv6 /64 network per UTC day (default 3); 429 means retry after the reset. GET /v1/usage reports free_requests_remaining separately from balance_credits. POST /v1/signup is retired and always returns 410 signup_disabled. Agents without an inbox can use /x402/v1/{endpoint} without an account.
servers:
- url: https://api.fastaf.co
tags:
- name: AI
paths:
/v1/ai:
get:
tags:
- AI
summary: AI-assisted search
description: Google AI Mode answer for a question, as JSON text blocks with the cited links. Empty answers are not charged.
security:
- bearerAuth: []
responses:
'200':
description: Provider response.
headers:
X-FastAF-Credits-Used:
schema:
type: integer
X-FastAF-Cost-Version:
schema:
type: string
content:
application/json:
schema:
type: object
properties:
text_blocks:
type: array
items:
type: object
properties:
type:
type: string
snippet:
type: string
links:
type: array
items:
type: object
properties:
link:
type: string
additionalProperties: true
additionalProperties: true
additionalProperties: true
example:
text_blocks:
- type: paragraph
snippet: An x402 server returns a payment request with HTTP 402; the client signs it and retries the request.
links:
- link: https://www.x402.org/
text/html:
schema:
type: string
'400':
$ref: '#/components/responses/BadRequest'
'401':
$ref: '#/components/responses/Unauthorized'
'402':
$ref: '#/components/responses/PaymentRequired'
'403':
$ref: '#/components/responses/Forbidden'
'429':
$ref: '#/components/responses/TooManyRequests'
'502':
$ref: '#/components/responses/BadGateway'
'503':
$ref: '#/components/responses/ServiceUnavailable'
'504':
$ref: '#/components/responses/GatewayTimeout'
x-fastaf-credit-cost: 10
x-fastaf-cost-version: v1
operationId: getAi
parameters:
- name: query
in: query
required: true
description: Required question/search text for Google AI Mode, e.g. How does an espresso machine work? No default. No option surcharge; 10 credits per successful request.
schema:
type: string
maxLength: 8192
- name: country
in: query
required: false
description: Two-letter search country code, e.g. us, uk or fr; default us. Localizes results, not a scrape proxy selection. No option surcharge; 10 credits per successful request.
schema:
type: string
maxLength: 8192
- name: language
in: query
required: false
description: Result/interface language code, e.g. en, es, fr or de; default en. Use lr, where supported, to restrict document languages. No option surcharge; 10 credits per successful request.
schema:
type: string
maxLength: 8192
- name: uule
in: query
required: false
description: Google's encoded geographic search token, copied from a Google URL. Omit for no explicit token; do not combine with location where supported. No option surcharge; 10 credits per successful request.
schema:
type: string
maxLength: 8192
- name: location
in: query
required: false
description: City-level search origin, e.g. Austin, Texas, United States; omit for source-default location. Cannot be combined with uule. No option surcharge; 10 credits per successful request.
schema:
type: string
maxLength: 8192
- name: safe
in: query
required: false
description: 'Adult-content filter: active enables SafeSearch; off disables it (default off). No option surcharge; 10 credits per successful request.'
schema:
type: string
maxLength: 8192
- name: html
in: query
required: false
description: Return raw source HTML instead of parsed JSON when true; true/false, default false. No option surcharge; 10 credits per successful request.
schema:
type: boolean
post:
tags:
- AI
summary: AI-assisted search
description: Google AI Mode answer for a question, as JSON text blocks with the cited links. Empty answers are not charged.
security:
- bearerAuth: []
responses:
'200':
description: Provider response.
headers:
X-FastAF-Credits-Used:
schema:
type: integer
X-FastAF-Cost-Version:
schema:
type: string
content:
application/json:
schema:
type: object
properties:
text_blocks:
type: array
items:
type: object
properties:
type:
type: string
snippet:
type: string
links:
type: array
items:
type: object
properties:
link:
type: string
additionalProperties: true
additionalProperties: true
additionalProperties: true
example:
text_blocks:
- type: paragraph
snippet: An x402 server returns a payment request with HTTP 402; the client signs it and retries the request.
links:
- link: https://www.x402.org/
text/html:
schema:
type: string
'400':
$ref: '#/components/responses/BadRequest'
'401':
$ref: '#/components/responses/Unauthorized'
'402':
$ref: '#/components/responses/PaymentRequired'
'403':
$ref: '#/components/responses/Forbidden'
'429':
$ref: '#/components/responses/TooManyRequests'
'502':
$ref: '#/components/responses/BadGateway'
'503':
$ref: '#/components/responses/ServiceUnavailable'
'504':
$ref: '#/components/responses/GatewayTimeout'
x-fastaf-credit-cost: 10
x-fastaf-cost-version: v1
operationId: postAi
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
properties:
query:
type: string
maxLength: 8192
description: Required question/search text for Google AI Mode, e.g. How does an espresso machine work? No default. No option surcharge; 10 credits per successful request.
country:
type: string
maxLength: 8192
description: Two-letter search country code, e.g. us, uk or fr; default us. Localizes results, not a scrape proxy selection. No option surcharge; 10 credits per successful request.
language:
type: string
maxLength: 8192
description: Result/interface language code, e.g. en, es, fr or de; default en. Use lr, where supported, to restrict document languages. No option surcharge; 10 credits per successful request.
uule:
type: string
maxLength: 8192
description: Google's encoded geographic search token, copied from a Google URL. Omit for no explicit token; do not combine with location where supported. No option surcharge; 10 credits per successful request.
location:
type: string
maxLength: 8192
description: City-level search origin, e.g. Austin, Texas, United States; omit for source-default location. Cannot be combined with uule. No option surcharge; 10 credits per successful request.
safe:
type: string
maxLength: 8192
description: 'Adult-content filter: active enables SafeSearch; off disables it (default off). No option surcharge; 10 credits per successful request.'
html:
type: boolean
description: Return raw source HTML instead of parsed JSON when true; true/false, default false. No option surcharge; 10 credits per successful request.
required:
- query
/x402/v1/ai:
get:
operationId: x402GetAi
summary: AI-assisted search
description: Google AI Mode answer for a question, as JSON text blocks with the cited links. Empty answers are not charged. Send query parameters, not a JSON body. The PAYMENT-REQUIRED header quotes the exact price for the selected options; sign it with an x402 v2 client and retry the same URL with PAYMENT-SIGNATURE. Invalid parameters or blocked targets return 400 without payment. Only successful calls are settled.
tags:
- AI
x-category: ai
x-output-schema:
anyOf:
- type: object
properties:
text_blocks:
type: array
items:
type: object
properties:
type:
type: string
snippet:
type: string
links:
type: array
items:
type: object
properties:
link:
type: string
additionalProperties: true
additionalProperties: true
additionalProperties: true
- type: string
security: []
x-payment-info:
protocols:
- x402: {}
price:
mode: fixed
currency: USD
amount: '0.010000'
parameters:
- name: query
in: query
required: true
description: Required question/search text for Google AI Mode, e.g. How does an espresso machine work? No default. No option surcharge; 10 credits per successful request.
schema:
type: string
maxLength: 8192
example: how do x402 payments work
example: how do x402 payments work
- name: country
in: query
required: false
description: Two-letter search country code, e.g. us, uk or fr; default us. Localizes results, not a scrape proxy selection. No option surcharge; 10 credits per successful request.
schema:
type: string
maxLength: 8192
- name: language
in: query
required: false
description: Result/interface language code, e.g. en, es, fr or de; default en. Use lr, where supported, to restrict document languages. No option surcharge; 10 credits per successful request.
schema:
type: string
maxLength: 8192
- name: uule
in: query
required: false
description: Google's encoded geographic search token, copied from a Google URL. Omit for no explicit token; do not combine with location where supported. No option surcharge; 10 credits per successful request.
schema:
type: string
maxLength: 8192
- name: location
in: query
required: false
description: City-level search origin, e.g. Austin, Texas, United States; omit for source-default location. Cannot be combined with uule. No option surcharge; 10 credits per successful request.
schema:
type: string
maxLength: 8192
- name: safe
in: query
required: false
description: 'Adult-content filter: active enables SafeSearch; off disables it (default off). No option surcharge; 10 credits per successful request.'
schema:
type: string
maxLength: 8192
- name: html
in: query
required: false
description: Return raw source HTML instead of parsed JSON when true; true/false, default false. No option surcharge; 10 credits per successful request.
schema:
type: boolean
responses:
'200':
description: Successful result; payment settled. Content type depends on the requested format.
headers:
PAYMENT-RESPONSE:
description: Base64-encoded x402 v2 settlement receipt.
schema:
type: string
X-FastAF-Credits-Used:
schema:
type: integer
minimum: 1
content:
application/json:
schema:
type: object
properties:
text_blocks:
type: array
items:
type: object
properties:
type:
type: string
snippet:
type: string
links:
type: array
items:
type: object
properties:
link:
type: string
additionalProperties: true
additionalProperties: true
additionalProperties: true
example:
text_blocks:
- type: paragraph
snippet: An x402 server returns a payment request with HTTP 402; the client signs it and retries the request.
links:
- link: https://www.x402.org/
text/html:
schema:
type: string
'400':
description: Invalid parameters or blocked target; nothing charged.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'402':
$ref: '#/components/responses/X402PaymentRequired'
'404':
description: Pay-per-call is not enabled on this deployment.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'409':
description: This signed payment is already in use or has already paid for a call.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'422':
description: The requested resource is unavailable; nothing settled.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'429':
description: IP burst limit reached. Retry after the Retry-After header interval.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'502':
description: Upstream failed, or returned blocked, empty or incomplete data; nothing settled.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'503':
description: Service, capacity or payment configuration unavailable; retry later.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
'504':
description: Upstream timed out; nothing settled.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
components:
responses:
BadGateway:
description: The upstream request failed.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
PaymentRequired:
description: The account has insufficient credits.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
TooManyRequests:
description: A rate or concurrency limit was reached.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
BadRequest:
description: Invalid request or parameters.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
Forbidden:
description: The account is suspended or email verification is required before data calls.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
Unauthorized:
description: A valid bearer API key is required.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
ServiceUnavailable:
description: The service is temporarily unavailable.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
GatewayTimeout:
description: The upstream request timed out.
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
X402PaymentRequired:
description: 'Payment required. Decode PAYMENT-REQUIRED (base64 JSON) for the authoritative x402 v2 accepts[].amount in USDC atomic units, network, asset and payTo. The JSON body also includes x402Version, resource and accepts, with maxAmountRequired and per-requirement resource/description/mimeType aliases for catalogs. This remains a v2 payment flow: sign and retry with PAYMENT-SIGNATURE. A failed settlement also returns 402 (settlement_failed) with PAYMENT-RESPONSE instead of data, without a payment challenge.'
headers:
PAYMENT-REQUIRED:
description: Base64-encoded x402 v2 payment challenge (present on unpaid requests).
schema:
type: string
PAYMENT-RESPONSE:
description: Base64-encoded settlement failure receipt, when settlement fails.
schema:
type: string
content:
application/json:
schema:
$ref: '#/components/schemas/PaymentRequired'
schemas:
Error:
type: object
required:
- error
properties:
error:
type: object
required:
- code
- message
properties:
code:
type: string
message:
type: string
PaymentRequired:
allOf:
- $ref: '#/components/schemas/Error'
- type: object
properties:
x402Version:
type: integer
const: 2
resource:
type: object
required:
- url
- description
- mimeType
description: The resource object from PAYMENT-REQUIRED, including discovery metadata.
properties:
url:
type: string
format: uri
description:
type: string
mimeType:
type: string
accepts:
type: array
minItems: 1
description: The v2 header requirements plus legacy discovery aliases. Present on payment challenges, not settlement failures.
items:
type: object
required:
- scheme
- network
- amount
- maxAmountRequired
- resource
- description
- mimeType
- payTo
- asset
- maxTimeoutSeconds
- extra
properties:
scheme:
type: string
const: exact
network:
type: string
description: CAIP-2 network identifier, unchanged from the v2 header.
amount:
type: string
pattern: ^[0-9]+$
maxAmountRequired:
type: string
pattern: ^[0-9]+$
description: Alias of amount, in atomic USDC units.
resource:
type: string
format: uri
description:
type: string
mimeType:
type: string
payTo:
type: string
asset:
type: string
maxTimeoutSeconds:
type: integer
extra:
type: object
additionalProperties: true
price:
type: object
required:
- usd
- credits
- asset
- network
properties:
usd:
type: string
pattern: ^[0-9]+\.[0-9]{6}$
credits:
type: integer
minimum: 1
asset:
type: string
const: USDC
network:
type: string
description: CAIP-2 network identifier.
how_to_pay:
type: string
with_a_key:
type: string
docs:
type: string
format: uri
securitySchemes:
bearerAuth:
type: http
scheme: bearer
bearerFormat: API key
sessionCookie:
type: apiKey
in: cookie
name: fastaf_session