FreeTier Agent API

1 free call per caller, then $0.001 USDC via x402 (paid in-band: params._meta["x402/payment"]). Public holidays for ~490 countries/territories for 2026 and 2027; optional date=YYYY-MM-DD answers is_holiday. When to use: Use holidays to list public holidays or test one date for a country.

1 free call per caller, then $0.003 USDC per page via x402 (paid in-band: params._meta["x402/payment"]). Invoice or receipt (PDF, PNG/JPEG/WebP image, or plain text) to structured JSON with a fixed schema: vendor (name, address, VAT ID, email, phone, IBAN), customer, invoice number, order number, issue/due date, currency (ISO 4217), subtotal, VAT total, total, amount due, VAT breakdown and line items. Every field has value, the verbatim source quote and a confidence score (0-1: quote found in the document, value matches quote, totals add up). Arithmetic checks included. $0.003 per page (max 10…

1 free call per caller, then $0.001 USDC via x402 (paid in-band: params._meta["x402/payment"]). Check up to 20 URLs in one call: HTTP status, final URL after redirects, redirect count, latency, content-type, ok flag. When to use: Use link-check to test up to 20 URLs for broken links in one call.

Free. List every endpoint (core products first) with its price in USDC, description and example query. Core: invoice-json $0.003/page, token-risk $0.005, site-contacts $0.003, page-rag $0.001; utilities $0.001; dataset downloads $1. 1 free call per route per caller.

1 free call per caller, then $0.001 USDC via x402 (paid in-band: params._meta["x402/payment"]). Token & cost calculator: estimate tokens for a text (or pass input_tokens/output_tokens) and price it across several models using provider list prices (LiteLLM price table, MIT). Params: models (comma list of model ids like gpt-4o-mini, claude-sonnet-4-5, gemini/gemini-2.5-flash or search words, max 15), text or input_tokens, output_tokens, calls. When to use: Use llm-cost to compare what a workload costs across models.

1 free call per caller, then $0.001 USDC via x402 (paid in-band: params._meta["x402/payment"]). AI model list prices (USD per 1M input/output/cached tokens, context window, vision/tools/reasoning flags) for ~3,000 models across OpenAI, Anthropic, Google, Mistral, Groq, Bedrock, Azure, Together, Fireworks and more, plus verified free tiers/rate limits of AI APIs. Filters: q, provider, free=yes, max_input_per_m, min_context, vision=yes, tools=yes, sort=input|output|context, limit<=100.

Free. List prices of five popular LLMs (USD per 1M tokens, LiteLLM table, MIT).

1 free call per caller, then $0.001 USDC via x402 (paid in-band: params._meta["x402/payment"]). Search 4,259 MCP (Model Context Protocol) servers by keyword, category, language (python/typescript/go/rust...), scope (cloud/local) and official flag. Returns repo URL and description.

Free. Five sample MCP servers from the 4,259-server directory (MIT source).

1 free call per caller, then $0.001 USDC via x402 (paid in-band: params._meta["x402/payment"]). One-call page audit for agents: HTTP status, redirects, latency, title, meta description, canonical, lang, Open Graph, JSON-LD types, headings, word count, plus agent-friendliness: robots.txt rules for 14 AI crawlers, llms.txt, sitemap, and a 0-100 score with reasons. When to use: Use page-check for status, redirects, headers and SEO basics of a URL; for content use page-rag.

1 free call per caller, then $0.001 USDC via x402 (paid in-band: params._meta["x402/payment"]). Convert a public web page to clean Markdown (title, headings, paragraphs, lists, links, code), scripts/nav/footer removed, max ~60k chars. robots.txt respected. When to use: Legacy converter. page-rag gives cleaner main-content Markdown plus chunks at the same price.

1 free call per caller, then $0.001 USDC via x402 (paid in-band: params._meta["x402/payment"]). Fetch a public web page (robots.txt respected) and return title, meta description, canonical, Open Graph/Twitter tags, language, headings, link counts, HTTP status. When to use: Use page-meta for title, description, Open Graph and headings only; for full content use page-rag.

1 free call per caller, then $0.001 USDC via x402 (paid in-band: params._meta["x402/payment"]). Any public web page -> clean LLM-ready Markdown + RAG chunks in one call: main content via Mozilla Readability (no nav/ads/footers), absolute links, title/description/language/canonical/published+modified dates/JSON-LD types, word + token estimates, sha256 content hash for change detection, and heading-aware chunks (configurable size + overlap, each with its heading path). Plain HTTP, robots.txt respected, Markdown/plain text passed through. Flags pages that likely need JavaScript. When to use: Use …

1 free call per caller, then $0.001 USDC via x402 (paid in-band: params._meta["x402/payment"]). Check whether a URL may be crawled per the site's robots.txt for a given user-agent. Returns allowed, matched rule, crawl-delay, sitemaps. When to use: Use robots-check before crawling a URL with your own user-agent.

1 free call per caller, then $0.003 USDC via x402 (paid in-band: params._meta["x402/payment"]). Company website -> one clean contact row: role emails only (info@, sales@ ...) with MX check, phones validated and normalized to E.164 with confidence, schema.org address/name, Danish CVR and EU VAT ids, official social profiles. Respects robots.txt, plain HTTP, home + up to 5 contact pages. Personal emails omitted (GDPR). When to use: Use site-contacts when you need the business contact details of a company from its own website. Use page-rag when you need the text of a page, and email-verify to che…

1 free call per caller, then $0.005 USDC via x402 (paid in-band: params._meta["x402/payment"]). Deterministic ERC-20 risk check on Base or Ethereum from public on-chain data only: privileged functions in bytecode (mint, blacklist, pause, fees, limits, trading switch), upgradeable proxy + implementation, owner and renounce status, Uniswap v2/v3 + Aerodrome liquidity in USD (Chainlink), owner/pool/burned supply share. Every flag has evidence; lists what was NOT checked (no honeypot simulation). Not financial advice. When to use: Use token-risk before an agent buys, lists or recommends an ERC-20 …

1 free call per caller, then $0.001 USDC via x402 (paid in-band: params._meta["x402/payment"]). Search ~8,900 live x402 pay-per-call APIs (verified/unverified by nohumans.directory probes, CC BY 4.0): name, endpoint URL, category, price, chains, status, score. Filters: q, category, chain, max_price, status=verified, limit<=100.