The open discovery layer for x402 services — 24506 verified service entries, LLM-ranked recommendations via /api/v1/ask, and service cards with payment, call, and quality metadata.

Add your API

Aggregated from public x402 sources — x402scan, awesome-x402, Coinbase CDP Bazaar, pay-skills PRs — plus our own crawling and provider self-submissions. Every entry is de-duplicated across sources, liveness-probed (health + on-chain payment demand), and passed through ingestion filters (bare-IP / dead-host removal) before listing — distilling tens of thousands of raw endpoints down to 24506 verified services.

Overall Stats

Live counters across the directory and discovery API

Services indexed
24506
x402 APIs · MCP · agent tools
Healthy
10060
last health check < 6 h
Categories
210
crypto · agent · data · LLM …
Chains
86
base · solana · arbitrum · …

Top rated

by quality score · health · trust signals
# Tool Grade Score
1 ATXP — The Account for AI Agents A 10.000
2 Bitrefill x402 A 10.000
3 ACP - Virtuals Protocol A 10.000
4 api.onesource.io A 10.000
5 OneSource - Ethereum RPC for AI Agents A 10.000
6 BotPay — AI Agent Payment Network and x402 Infrastructure A 10.000
7 blockrun.ai A 10.000
8 blockrun-web-vbsbhh7lea-uc.a.run.app A 10.000
9 enrichx402.com A 10.000
10 StableStudio A 10.000
11 Clash of Coins A 10.000
12 Clash of Coins A 10.000
13 MERX - TRON Resource Exchange A 10.000
14 Otto AI x402 — Market Intelligence, DeFi & Tools A 10.000
15 gotobi.hugen.tokyo A 10.000
16 Weather API A 10.000
17 mailcheck.hugen.tokyo A 10.000
18 Scout — Multi-source Intelligence API A 10.000
19 intel.hugen.tokyo A 10.000
20 Visual API A 10.000

All services

Crawled from awesome-x402, CDP Bazaar, x402scan and manual submissions · refreshed daily.

“agent-ready.x402tookit.com” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.

“CheapestInference” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • AI inference on Base L2. Unlimited time-block subscriptions to frontier open-source LLMs.

  • LLM inference API (OpenAI- and Anthropic-compatible) with x402 pay-per-request in USDC on Base: keyless requests get a 402 with USDC pricing. Serves open-weights models (Kimi K2.7, GLM 5.2, MiniMax M3, DeepSeek V4 Flash), and agents can also purchase flat-monthly unlimited subscription pools autonomously. ([Agent Card](https://api.cheapestinference.com/.well-known/agent.json) | [MCP](https://api.cheapestinference.com/mcp) | [llms.txt](https://cheapestinference.com/llms.txt))

  • CheapestInference is unlimited LLM inference at a flat monthly price — no token caps, no per-token billing. Subscribe to a pool of frontier open-source models and use them through an OpenAI-compatible API (Anthropic-compatible endpoint included — works with Claude Code, Cursor, and any OpenAI SDK). This MCP server is the commercial front door: AI agents and humans can browse live pools and pricing, get a USDC quote, pay on Base L2, and receive an API key — end to end, no browser and no human needed. Card checkout links available too, and keyless pay-per-request is supported via the x402 protocol.

“Clanker Banker — paywall co-pilot + page→LLM pack (x402 · Base USDC)” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.

“Hexbox Tools” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • Send a link to a GLB, glTF, FBX, OBJ, STL, PLY, USD or .blend file (or a zip with one inside). It gets opened in headless Blender and you get back what is actually in it: triangles, vertices, n-gons, materials, texture sizes, real size and bounds, meshes with no UVs or no material, unapplied transforms, animations, and plain warnings for the usual problems (exported in cm, floating off the ground,

  • Best-time-to-send Bitcoin fee forecast for AI agents. Returns JSON with send_now/wait/economy recommendation, 24h fee history context, mempool depth, and sats-saved example for a typical send. Free live fees at /api/fees. Discovery: /llms.txt, /openapi.json, /api/agent.json. Pay 21 sats Lightning L402: GET returns 402 with macaroon+invoice, pay, retry with Authorization L402 macaroon:preimage. Ope

  • Fetch a public http(s) URL and return cleaned markdown, page metadata, same-origin agent discovery files (llms.txt, OpenAPI, ai-plugin), and Lightning pay hints. Free preview at /api/preview. Discovery: /llms.txt, /openapi.json, /api/agent.json. Pay 21 sats Lightning L402: GET returns 402 with macaroon+invoice, pay, retry with Authorization L402 macaroon:preimage and ?url=. Public URLs only; priva

“llm-cost-calc.x402tookit.com” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.

“Model Access Gateway: pay-per-call LLM API in USDC (x402), no API key” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.

“Setu.Anantasutra: Agent Tools API” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.

“SYNTHORA LLM Gateway SMART” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.

“Verdoc” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • Verdoc
    No callable URL published
    mcp unknown

    Deterministic AGENTS.md generation and repository analysis for coding agents, paid per call in USDC over x402. No account, no API key.

  • Deterministic GitHub repository analysis and AGENTS.md generation. No language model is used: every command is quoted from a manifest in the repository and every path is checked against the git tree, so results are reproducible for a given commit.

  • Deterministic GitHub repository analysis for coding agents. Returns an AGENTS.md with build and test commands quoted from the repository's own manifests, each tagged with the file it came from, plus a directory map and entry points. No language model is used: every path is checked against the git tree and ambiguous areas are marked unverified rather than guessed, so the same commit always returns

  • 檢查網站的 llms.txt、Markdown 頁面、robots.txt AI 爬蟲設定與 sitemap,並自動產生 llms.txt 草稿。

    B6.8 utility baseeip155:8453solanasolana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $0.3000 USDC / call
  • LLM inference API: OpenAI-compatible chat completions for 136 AI models (Claude, GPT, Gemini, Grok, DeepSeek, Qwen, Kimi, GLM), paid per call in USDC on Base with x402. No account, no API key, automatic refund if the model fails.

    B7.6 ai baseeip155:8453 $0.0010–$0.0030 USDC
  • LLM inference API: OpenAI-compatible chat completions for 136 AI models (Claude, GPT, Gemini, Grok, DeepSeek, Qwen, Kimi, GLM), paid per call in USDC on Base with x402. No account, no API key, automatic refund if the model fails.

    B7.6 ai baseeip155:8453 $0.0010–$0.0067 USDC
  • 3 independent LLM perspectives (security, logic, gas) + static analysis. Returns scored findings.

    B+8.5 utility baseeip155:8453 $0.3200 USDC / call
  • llm-proxy
    ● healthy

    Pay-per-call Gemini LLM inference. x402, USDC on Base, 0.002-0.02 by model tier.

    B7.0 ai baseeip155:8453 $0.0020 USDC / call
  • —

    D4.0 example-apps
  • GEDX402 LLM
    ● healthy

    Qwen3 30B FP8 frontier — reasoning, code, and agent tiers via ?full=1.

    A9.4 ai baseeip155:137eip155:42161eip155:480eip155:8453solanasolana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $0.0080–$0.0800 USDC
  • LLM Toll
    ● healthy

    AI chat and summarization powered by Groq Llama 3.3 70B

    B+8.4 ai baseeip155:8453 $0.0100–$0.0200 USDC
  • —

    B+8.2 x402 basesolanapolygonarbitrum $0.0200 USDC / call
  • JWT-gated LLM gateway: authenticate (bcrypt/JWT), then run a LangChain-on-Vertex Gemini completion.

    C+5.5 model-context-protocol-mcp stripe
  • Google-OAuth-gated LLM gateway: verify a Google ID token, then run a Gemini (Vertex AI) completion f

    C+5.5 model-context-protocol-mcp stripe
  • Proxy Gemini (Vertex AI) completions wrapped in OpenTelemetry trace spans; returns the answer plus t

    C+5.5 model-context-protocol-mcp stripe
  • Six checks: llms.txt, llms-full.txt, .md twins, Accept: text/markdown, sitemap.md, alt link. Free.

    C+5.3 model-context-protocol-mcp
  • Run a prompt through a LangChain (system + human) chain over Gemini on Vertex AI; optional LangSmith

    C+5.5 model-context-protocol-mcp stripe
  • Run a prompt through a LangChain (system + human) chain over Gemini on Vertex AI; optional LangSmith

    C+5.5 model-context-protocol-mcp stripe
  • x402 LLM Gateway
    ● healthy

    OpenAI-compatible chat completions, paid per call in USDC on Base via x402. $0.01 per call, no account or API key.

    C+6.0 ai base $0.0100 USDC / call
  • Deterministic repair of broken or LLM-style JSON into valid JSON, $0.005 per call via x402.

    B6.6 utility baseeip155:8453 $0.0050 USDC / call
  • x402-powered LLM provider intelligence API. Get recommendations, capability data, and status for AI agent routing decisions. Pay per query in USDC on Base mainnet.

    A9.2 ai baseeip155:8453 $0.0010–$0.0050 USDC
  • Free paywall co-pilot /v1/resolve. Paid llm-pack $0.005, clean $0.002, extract $0.01. x402 USDC on Base. No free trial. No hub.

    B7.2 trading baseeip155:8453 $0.0010–$0.0075 USDC
  • LLM API
    ● healthy

    LLM API offers pay per call inference on a curated set of frontier models. OpenAI compatible chat completions, Anthropic native messages, the Responses API, and embeddings, billed by exact token usage. Responses are non streaming; set stream to false. The full model catalog is available with an LLM API account at llmapi.ai. This server is a transparent proxy in front of LLM API's own API that s...

    C4.9 ai baseeip155:8453
  • OpenAI-compatible /v1/chat/completions pay-per-call, no API keys. Smart free-tier models (llama-3.3-70b class) with automatic upstream failover, Ed25519-signed. 0.005 USDC via x402 on Base. POST {"messages":[{"role":"user","content":"..."}]}.

    B+8.2 ai baseeip155:8453 $0.0050 USDC / call
  • Ranks models cheapest first by blended USD per 1M tokens (inputShare weights input vs output). Filter by provider, mode, minContextTokens, input/output modality, function calling, vision and price caps. Skips sample_spec and models past their deprecation date.; Looks up pricing for one model by name

    B6.8 utility baseeip155:8453 $0.0050 USDC / call
  • Uncensored 27B LLM inference (Qwen3.8-27B) + live data API. OpenAI-compatible chat, 98k ctx, ~230 tok/s, no content filter. x402 pay-per-use USDC on Base: $0.02 per call (4 free/day/IP). Data endpoints: GET /data/news (headlines $0.02), /data/price (crypto+equities+commodities $0.01), /data/signal (prediction-market edge feed $0.05). Agent discovery: /agent.md, /llms.txt, /.well-known/ai-catalog.j

    C4.3 general base $0.0200 USDC / call
  • NoJunk LLM
    ● healthy

    Pay-per-call, OpenAI-compatible LLM API for agents: POST /v1/chat/completions (Llama 3.3 70B or Qwen 2.5 Coder 32B, up to 32,000 characters of messages, up to 1,024 output tokens, optional JSON mode) and POST /v1/embeddings (BGE-M3, 1,024 dimensions, up to 32 inputs per call). Point any OpenAI client at this base URL and pay per request in USDC on Base via x402: no API key, no account, no rate ...

    B+8.0 ai baseeip155:8453 $0.0010–$0.0050 USDC
  • OpenAI-compatible LLM gateway at $0.005/call — change base_url, pay in USDC. Plus pay-per-call market data: multi-oracle price consensus, sentiment, forex, equities, commodities, Brazil macro (BCB/B3) and crypto. No API keys, no accounts. USDC on Base, Solana, Algorand and Polygon via x402.

    A9.0 ai baseeip155:137eip155:8453solanasolana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $0.0010–$99.9900 USDC
  • Multi-LLM Smart Contract Audit: 3 independent LLM perspectives (security, logic, gas) + static pattern scan on Solidity/Vyper source. Severity: clean/low/medium/high/critical. Ed25519-signed, publishable on-chain. POST {"source":"pragma solidity...","language":"solidity"} or {"address":"0x..","chain":"base"} for Sourcify-verified contracts.

    B+8.5 a2a-agent base $0.3200 USDC / call
  • Rough LLM token estimate of text from characters and words, as a low-high range by content type. Not a tokenizer.

    B7.0 general eip155:137eip155:42161eip155:8453solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $0.0200 USDC / call
  • SYNTHORA LLM Gateway SMART: OpenAI-compatible /v1/chat/completions pay-per-call, no API keys. Large free-tier models (llama-3.3-70b class) with automatic upstream failover, Ed25519-signed. 0.005 USDC via x402 on Base. POST {"messages":[{"role":"user","content":"..."}]} (or {"prompt":"..."}).

    B+8.5 a2a-agent base $0.0050 USDC / call
  • Fetch any public web page live and get clean main-content text, light Markdown, page metadata and the outbound link graph. Up to 10 URLs per call, pay per URL. Pick fields (price, author, date) straight from JSON-LD/meta; recovers content from JS-rendered pages without a browser; flags hidden prompt-injection text. Keyless x402 USDC on Base, no signup. Free preview at /web/extract/preview. $0.003 per URL. Ed25519-signed receipts.

    A8.9 data base $0.0050 USDC / call
  • 63 keyless pay-per-call endpoints for AI agents, paid in USDC on Base over x402: on-chain reads (balances, transactions, token info, token safety, Uniswap V3 price), network checks (RDAP whois, DNS, TLS certificates, IP/ASN, blocklists), email verdict with a 0-100 score and the evidence behind it, OFAC SDN screening, ECB FX rates, weather and time zones. Every answer carries a `next` array with the follow-up call prefilled. $0.001–$0.01 per call. No account, no API key.

    B+8.4 general eip155:137eip155:42161eip155:8453 $0.0050 USDC / call
  • x402-paid LLM APIs on a private GPU fleet (Qwen3.8-27B, VL 30B). USDC on Base, settle in seconds via a self-hosted facilitator. Unique: verifier-gated correctness on /premium/deep — wrong answers regenerated free. First call free, no wallet: POST /premium/first.

    B6.9 ai baseeip155:8453 $0.0100–$0.1000 USDC
  • Historical cloud pricing for AWS, GCP and Azure back to 2014, GPU rental prices across neo-clouds and marketplaces, and LLM token prices per model, as free charts and as an API that agents pay per request in USDC over x402.

    A9.6 crypto baseeip155:1eip155:10eip155:130eip155:1329eip155:137eip155:146eip155:42161eip155:43114eip155:480eip155:5042eip155:8453eip155:999 $0.0100–$3.0000 USDC
  • Free LLM agent security review: paste your system prompt, get a ~35s report with live jailbreak/injection/extraction probes plus a static audit of which guardrails your spec is missing. No signup.

    B+8.1 ai baseeip155:1eip155:8453 $0.0002–$0.0506 USDC
  • Runs one language model completion for a text prompt of up to 4000 characters and returns the generated answer as JSON. Price is 0.008 USDC per call.

    C4.7 general eip155:84532
  • Verdoc
    ● healthy

    Deterministic GitHub repository analysis and AGENTS.md generation. No language model is used: every command is quoted from a manifest in the repository and every path is checked against the git tree, so results are reproducible for a given commit.

    C+6.0 ai baseeip155:8453 $0.0100–$0.0200 USDC
  • Verdoc
    ● healthy

    Deterministic GitHub repository analysis for coding agents. Returns an AGENTS.md with build and test commands quoted from the repository's own manifests, each tagged with the file it came from, plus a directory map and entry points. No language model is used: every path is checked against the git tree and ambiguous areas are marked unverified rather than guessed, so the same commit always returns

    C4.3 general
  • Give this API any text or binary data and it returns its fingerprint under whichever hash algorithms you choose - SHA-256, SHA-512, MD5, BLAKE2, CRC32 and more. It also signs data with a secret key (HMAC) and safely verifies whether an incoming signature matches, using a timing-safe comparison. Language models cannot hash: they emit a string of the right length and character set that is simply ...

    B8.0 general eip155:8453solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $0.0100 USDC / call
  • agentreeve.com
    ● healthy

    POST a question; a language model turns it into a compute spec, AgentReeve runs it on recorded data and returns the numbers, the exact spec used and a short answer grounded only in those numbers.

    B7.4 general eip155:8453 $0.0100–$0.1500 USDC
  • Deepent Research — refusal-free LLM inference (per-request)

    C+6.0 general eip155:8453 $0.0500–$0.1500 USDC
  • x402 List
    ● healthy

    Agent-first directory of x402 API services with live uptime monitoring and machine-readable discovery for AI agents (JSON API, OpenAPI 3.1, llms.txt). Per-service endpoints, pricing, response time, and uptime charts. ([API](https://x402-list.com/api/v1/services)) ([OpenAPI](https://x402-list.com/api/v1/openapi.json)) ([llms.txt](https://x402-list.com/llms.txt))

    D4.0 monitoring-analytics
  • Informational Bittensor allocation analysis API for AI agents, paid with x402 v2 USDC on Base. Supports walletless model portfolio snapshots, wallet-specific preflight flows, OpenAPI, read-only MCP, and llms.txt discovery. ([OpenAPI](https://api.stakao.com/agent/openapi.json) | [Docs](https://stakao.com/docs/ai-agents.md) | [llms.txt](https://stakao.com/llms.txt))

    D4.0 data-social-apis
  • tx402.ai
    ● healthy

    Agent-native LLM inference gateway. 20+ EU-hosted models (DeepSeek, Qwen, Llama, GLM, Mixtral) via x402 USDC micropayments on Base. OpenAI-compatible API, SSE streaming, GDPR-compliant, zero data retention. No API keys — wallet is auth. [Models](https://tx402.ai/v1/models) | [OpenAPI](https://tx402.ai/openapi.json) | [llms.txt](https://tx402.ai/llms.txt) | [Source](https://github.com/Tensorix-ai/agent-gateway)

    C5.0 api-examples
  • us-agentic.com
    ● healthy

    Fetch a public URL and return clean LLM-ready markdown from static HTML.

    B7.3 general eip155:8453 $0.0050 USDC / call
  • Fetch a site's /llms.txt and check its format: H1 title, summary, sections and links, with the problems listed.

    B7.0 general eip155:137eip155:42161eip155:8453solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp $0.0300–$0.2500 USDC
  • Validates an llms.txt file against the llmstxt.org spec for free; /generate drafts a correct llms.txt from a site's own pages, paid in USDC on Base (x402). Pay by sending USDC to the address in the 402 challenge, then retry with header X-PAYMENT-TX: <tx hash>.

    B6.3 x402 base $0.0300 USDC / call
  • LLM inference API (OpenAI- and Anthropic-compatible) with x402 pay-per-request in USDC on Base: keyless requests get a 402 with USDC pricing. Serves open-weights models (Kimi K2.7, GLM 5.2, MiniMax M3, DeepSeek V4 Flash), and agents can also purchase flat-monthly unlimited subscription pools autonomously. ([Agent Card](https://api.cheapestinference.com/.well-known/agent.json) | [MCP](https://api.cheapestinference.com/mcp) | [llms.txt](https://cheapestinference.com/llms.txt))

    D4.0 gpu-inference-apis
  • Webshop agent-readiness score (https robots sitemap llms schema). x402.

    B7.3 ecommerce basepolygon $0.0500 USDC / call
  • Occultron
    ● healthy

    Accountless, crypto-paid uncensored open-weight LLM inference with signed execution receipts (OpenAI-compatible).

    C4.3 general base $0.0000 USDC / call
  • gate402.app
    ● healthy

    Fetch any public URL, render client-side JS, strip nav/ads, return clean LLM-ready Markdown.

    B+8.4 general eip155:137eip155:42161eip155:8453 $0.0020 USDC / call
  • datastand.dev
    ● healthy

    Current LLM API pricing, verified by hand every week: input and output USD per million tokens, plus cached-input rates and context windows where the provider publishes them, across Anthropic, OpenAI, Google, xAI and Together. Every row is read off the provider's own page on its stated date and carries that URL. A row the provider stops publishing is dropped, not carried forward. The free listin...

    B+8.0 general eip155:8453 $0.0200–$0.0500 USDC
  • api.proxyllm.ai
    ● healthy

    LLM cost scout: send your monthly OpenAI API spend in USD and get back the flat ChatGPT/Codex subscription tier that absorbs it through the ProxyLLM gateway, the exact new monthly total and savings, the live model catalog, and machine-readable signup steps an agent can complete autonomously (email OTP, no browser).

    B7.4 general base $0.0050 USDC / call
  • Which discovery documents does a host serve? llms.txt, agent card, owners.json, mcp.json.

    C+5.3 model-context-protocol-mcp
  • Pay-per-call JSON tools for AI agents: Indian identifier validation (GSTIN, PAN, TAN, CIN, LLPIN, IFSC, PIN code, UPI ID, vehicle registration), AI-visibility (GEO) audits, AI crawler robots.txt matrices and llms.txt checks. x402 (USDC on Base) or RapidAPI.

    C+6.0 search baseeip155:8453 $0.0050–$0.0200 USDC
  • Hexbox Tools
    ● healthy

    Fetch a public http(s) URL and return cleaned markdown, page metadata, same-origin agent discovery files (llms.txt, OpenAPI, ai-plugin), and Lightning pay hints. Free preview at /api/preview. Discovery: /llms.txt, /openapi.json, /api/agent.json. Pay 21 sats Lightning L402: GET returns 402 with macaroon+invoice, pay, retry with Authorization L402 macaroon:preimage and ?url=. Public URLs only; priva

    C4.3 general lightning
  • Send habit stats; get ranked next-best actions per habit, each with a rationale and a priority score. Deterministic, no LLM.

    B6.2 general eip155:8453 $0.0300 USDC / call
  • AI API Radar
    ● healthy

    Live LLM API price + status radar across 11 providers, with public per-model price HISTORY.

    C+5.9 model-context-protocol-mcp
  • Runs a single prompt against up to 5 LLMs in parallel and returns all responses, token counts, latencies, and costs in one call

    C4.3 general $0.0200 USDC / call
  • x402.momusai.io
    ● healthy

    Momus football model: 1X2 probabilities, fair odds, correct-score grid and derived markets for one fixture. Deterministic Dixon-Coles, no LLM. Team names are matched loosely.

    C+5.8 general eip155:4663eip155:8453 $0.0500 USDC / call
  • 51 Baidu AI MCP tools: OCR, Vision, LLM, Speech, NLP, Image Gen, Video Gen. 50 free calls/day. No credit card. Pay-per-call from $0.001.

    B7.0 ai baseeip155:8453 $0.0010–$0.3000 USDC
  • Crypto compliance suite for AI agents. VASP address identification (20,468 addresses, 29 chains), risk scoring (0-100 with signal detection), and sanctions/mixer screening (single + batch). Three endpoints at $0.01 USDC per call on Base. [Source](https://github.com/tedddb-ai/compliance-api) | [llms.txt](https://compliance-api-ruddy.vercel.app/llms.txt)

    D4.0 api-examples