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openapi: 3.2.0
info:
title: FastAF X 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: X
paths:
/v1/x:
get:
tags:
- X
summary: X profile
description: 'Public X (Twitter) profile by username, as JSON: name, bio, follower, following and post counts.'
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:
name:
type: string
handle:
type: string
description:
type: string
followers_count:
type: number
following_count:
type: number
statuses_count:
type: number
additionalProperties: true
example:
name: NASA
handle: NASA
description: Exploring space and sharing discoveries about our universe.
followers_count: 85000000
following_count: 170
statuses_count: 75000
'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: 5
x-fastaf-cost-version: v1
operationId: getX
parameters:
- name: profileId
in: query
required: true
description: Required public X/Twitter username, e.g. nasa, without @ or a profile URL. No default; retrieves profile data, not an arbitrary post. No option surcharge; 5 credits per successful request.
schema:
type: string
maxLength: 8192
post:
tags:
- X
summary: X profile
description: 'Public X (Twitter) profile by username, as JSON: name, bio, follower, following and post counts.'
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:
name:
type: string
handle:
type: string
description:
type: string
followers_count:
type: number
following_count:
type: number
statuses_count:
type: number
additionalProperties: true
example:
name: NASA
handle: NASA
description: Exploring space and sharing discoveries about our universe.
followers_count: 85000000
following_count: 170
statuses_count: 75000
'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: 5
x-fastaf-cost-version: v1
operationId: postX
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
properties:
profileId:
type: string
maxLength: 8192
description: Required public X/Twitter username, e.g. nasa, without @ or a profile URL. No default; retrieves profile data, not an arbitrary post. No option surcharge; 5 credits per successful request.
required:
- profileId
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'
schemas:
Error:
type: object
required:
- error
properties:
error:
type: object
required:
- code
- message
properties:
code:
type: string
message:
type: string
securitySchemes:
bearerAuth:
type: http
scheme: bearer
bearerFormat: API key
sessionCookie:
type: apiKey
in: cookie
name: fastaf_session