x402 Directory

Browse every paid API

Every x402 endpoint we can find. Sort by what people really pay for, or by the cheapest.

3,997 endpoints

GPT Image 1.5 Low

by @amnt · on AMNT

GPT Image 1.5, low quality: text to picture. Clean flat art: logos, icons and stickers. Square 1024x1024, transparent PNG or JPEG. $0.013, about 15 s.

$0.01 Base Creator keeps 100%

Uptime Monitor

by @ax3lflores · on AMNT

Produce a ready-to-run website uptime monitor script that checks sites, records failures, persists state, and sends single down/recovery emails when configured.

$0.05 Base Creator keeps 100%

Solidity Reentrancy Audit

by @desert_tundra · on AMNT

Audit Solidity contracts for reentrancy vulnerabilities and practical gas optimizations, returning findings, concrete fixes, and unit-test snippets.

$0.02 Base Creator keeps 100%

Accessibility Auditor

by @glassy_pine · on AMNT

Reviews HTML snippets for WCAG 2.1 AA accessibility issues and returns clear findings, severity, and remediation steps.

$0.02 Base Creator keeps 100%

Conventional Commit Writer

by @pearl_otter · on AMNT

Convert a raw git diff into a single, clear Conventional Commit message with proper type, optional scope, concise subject, and an informative body if needed.

$0.02 Base Creator keeps 100%

Subscription Analyzer

by @mint_anchor · on AMNT

Analyze a list of SaaS subscriptions to find duplicates, normalize plans, estimate ROI, rank services, and recommend consolidation and savings actions.

$0.02 Base Creator keeps 100%

Strale · Email Validate

Strale · api.strale.io

Validate an email address: RFC 5322 syntax, MX records, 5,361 disposable domain detection, role-based address detection (35 patterns), free provider detection, and typo suggestion for common providers (gmial.com ? gmail.com). Returns deliverability assess…

$0.03 Base 100% up 1,879 paid calls

BlockRun.AI · EXA Contents

BlockRun.AI · blockrun.ai

Extract full text content from specific URLs. Priced at $0.002/URL — total = urls.length × $0.002.

$0.003 Base 100% up 1,872 paid calls

BlockRun.AI · EXA Answer

BlockRun.AI · blockrun.ai

Get an AI-generated answer to a question grounded in live web search results.

$0.01 Base 100% up 1,869 paid calls

Tavily · Search

Tavily · x402.tavily.com

Tavily Search - advanced mode

$0.01 Base 100% up 1,774 paid calls

Web Search (SERP) · Serp

Web Search (SERP) · api.kadec0.xyz

Web search results (SERP). Keyless web search returning ranked title, URL, and snippet for a query — with locale/region targeting, freshness filters (past day, week, month, year), pagination, a news mode that adds publish date and source, and selectable backend engine (auto rotation, or pin Brave, Yahoo, or Yandex).

$0.03 Base 100% up 1,741 paid calls

StableEnrich · PDL People Enrich

StableEnrich · stableenrich.dev

PDL Person Enrich — career history, emails, phone. Requires one of: `email`, `profile` (LinkedIn URL), or `first_name` + `last_name` + (`company_name` OR `company_domain`). `{ first_name, last_name }` alone returns 400. Prefer `email` when known, then `profile`. No match: HTTP 200, status 404, data null — not billed. Match: $0.28.

$0.28 Base 100% up 1,696 paid calls

StableTravel · Seats Aero Availability

StableTravel · stabletravel.dev

Retrieve bulk cached Seats.aero award availability for a mileage program, optionally filtered by region, date, and cabin.

$0.04 Base 100% up 1,420 paid calls

Google Trends SEO Keyword Data · Trend

Google Trends SEO Keyword Data · google-trends.use.x402atlas.com

Google Trends interest over time for a keyword — worldwide search popularity as a monthly series for keyword research, SEO & demand trend analysis.

$0.05 Base 100% up 1,352 paid calls

Loyalspark · Recipient API Offers

Loyalspark · api.loyalspark.online

Onchain loyalty platform on Base Network. Businesses launch branded rewards in minutes, customers earn real value with every purchase, and AI agents automate the rest via REST and MCP. Free plan mints up to 1,000 tokens per month; every call is scoped by row-level security to the wallet behind the API key. 16 skill guides at loyalspark.online/.well-known/skills/index.md.

$0.001 Base 100% up 1,310 paid calls

Onesource · Chain Block Number

Onesource · api.onesource.io

Latest Ethereum block height - current chain tip via eth_blockNumber

$0.001 Base 100% up 1,268 paid calls

StableEnrich · Fullenrich People Search

StableEnrich · stableenrich.dev

FullEnrich People Search — filter by company domain/name/LinkedIn URL, seniority, title, location, skills, and 20+ FullEnrich filters. Default lean roster: companies map + company_id refs; include_employment_history or verbose for full history. $0.15 when results found; free when no matches.

$0.15 Base 100% up 1,195 paid calls

Onesource · Chain Erc20 Balance

Onesource · api.onesource.io

ERC20 token balance for any Ethereum wallet - USDC, USDT, DAI, or any token - via balanceOf (eth_call) on OneSource live Ethereum RPC

$0.003 Base 100% up 1,146 paid calls

Onesource · Chain ENS

Onesource · api.onesource.io

ENS resolve - turn a .eth name into an address, or an address into its primary .eth name, via eth_call on OneSource live Ethereum RPC

$0.005 Base 100% up 1,137 paid calls

Oneshotagent · Tools Search

Oneshotagent · win.oneshotagent.com

Web search returning URLs, titles, and descriptions

$0.001 Base 1,079 paid calls