x402 Directory

AI & inference

Paid ai & inference APIs an AI agent can call with x402.

360 endpoints

API Rescue

by @ax3lflores · on AMNT

Detect API failures, validate responses against schema or baseline, diagnose causes, and propose code fixes and regression tests in the requested language.

$0.03 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%

Data Cleaner

by @ax3lflores · on AMNT

Clean, validate, standardize and deduplicate tabular datasets, preserve originals, and produce Excel, PDF, JSON or TXT export reports with full change logs.

$0.02 Base Creator keeps 100%

Intraday Setup

by @keen_iris · on AMNT

Structured intraday trading setups for NASDAQ tickers with strict verified-data rules: entries, stops, targets, R:R and no-trade calls.

$0.01 Base Creator keeps 100%

NAS100 Intraday Setups

by @keen_iris · on AMNT

Intraday NAS100 setups that apply H1‑M15‑M3‑M1 Retest and Continuity rules, max 30‑point stops, minimum 1:2 R:R, or WAIT if none.

$0.01 Base Creator keeps 100%

Refund Reconciliation

by @ax3lflores · on AMNT

Analyze seller exports (CSV/XLSX/JSON) to find refund discrepancies, duplicate refunds, unmatched transactions, and missing reimbursements with evidence and verification steps.

$0.05 Base Creator keeps 100%

BlockRun.AI · EXA Search

BlockRun.AI · blockrun.ai

Neural and keyword web search. Optional category filter: company, research paper, news, pdf, github, tweet, personal site, linkedin profile, financial report.

$0.01 Base 100% up 2,066 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

Aubr · Chat Encrypted

Aubr · x402-api.aubr.ai

Send an HPKE-encrypted prompt to the Aubrai chat agent running inside an attested private enclave. Only the enclave can decrypt your message.

$0.02 Base 100% up 756 paid calls

FarOut LLM Gateway · Chat Completions

FarOut LLM Gateway · farouter.tech

[OI]-compatible LLM inference API for autonomous agents. Supports reasoning, coding and chat workloads. Pay with USDC on Base using x402 (upto scheme, true-up billing): the 402 quotes a spending CAP (estimated input tokens + your max_tokens at the model's per-1M price), and after the model answers you are settled for the ACTUAL usage — always <= the cap, never more. Minimum $0.001, cap $3.0 per call. Cached input bills at 10%. Failed calls are never charged. Any model from GET /v1/models.

$0.001 Base 396 paid calls

Orthogonal · Chat Completions

Orthogonal · x402.orthogonal.com

Send a conversation to a model and get a completion back. Works exactly like the OpenAI chat completions endpoint. Pass messages and a model slug, get a response with the assistant's reply. Supports streaming for real-time token delivery, tool calling for function execution, structured outputs via response_format, and controllable reasoning depth on supported models. | ERROR: Unable to calculate price.

$0.005 Base 261 paid calls

OpenRelay Premium Chat · Chat Completions

OpenRelay Premium Chat · openrelay.hggfffdfy687.workers.dev

OpenAI-compatible chat completion (branded tier). $0.10/1M tokens, min $0.0010/request. USDC on Solana or Base.

$0.001 Base 255 paid calls

CheapTokens AI Inference · BUY

CheapTokens AI Inference · cheaptokens.ai

OpenAI-compatible LLM inference and chat completions via discounted Venice API credits. Pay USDC to receive a live Venice.ai API key for /api/v1 models, chat, images, audio, video, and embeddings. Same-Day credits are 30–90% below Venice direct and expire at 23:59 UTC; Prepaid API Keys support recurring agent jobs.

$1.00 Base 249 paid calls

2s · Stocks Earnings Surprises

2s · 2s.io

Historical quarterly earnings surprises for a US-listed company — reported (actual) EPS vs the analyst consensus estimate, the absolute surprise, and the surprise percentage, for the most recent quarters (newest first). Pass ticker (optionally limit). Tells you whether a company has been beating or missing expectations. Data by Finnhub.

$0.0025 Base 100% up 222 paid calls

GEDX402 Chat · Chat Completions

GEDX402 Chat · chat.gedx402.com

Multi-model chat completions. POST messages[] and set model to any LLM id from GET /v1/models; dynamic USDC pricing scales with model and token usage. Hero: GET /heroes/chat-completions.

$0.001 Base 180 paid calls

Word of the Day · Word OF THE DAY

Word of the Day · x402wordoftheday.vercel.app

Get today's curated Word of the Day (definition + part of speech).

$0.0015 Base 160 paid calls

Delx Array Uniq · ARR Uniq

Delx Array Uniq · api.delx.ai

Deduplicate a list preserving order. Call when you unique agent keys without sorting. Returns unique items and count for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

$0.001 Base 100% up 130 paid calls

Surplusintelligence · Chat Completions

Surplusintelligence · api.surplusintelligence.ai

Get OpenAI-compatible inference from many models at market prices via Surplus Intelligence.

$0.0033 Base 129 paid calls

Vaaya · Tikhub Fetch

Vaaya · vaaya.ai

TikHub — 742 per-call social-data endpoints (GET) across douyin/tiktok/weibo/instagram/bilibili/zhihu/kuaishou/youtube & more. Pass { endpoint, ...params } (params per endpoint; most reads take username/user_id/keyword + pagination_token). Find endpoints via vaaya/discover or the social-data knowledge doc. Most calls 1¢.

$0.01 Base 100% up 128 paid calls

Loyalspark · X402 Gateway Merchant Profile

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.

$0.005 Base 100% up 124 paid calls