Pay-per-call endpoints for AI agents: model prices, MCP servers, holidays, page checks (x402, USDC on Base)
Disclosure: I built this with help from AI tools, and it is my own paid service. Prices and limits below are what the API charges today.
I run a small pay-per-call API for AI agents: FreeTier Agent API. There's no signup and no API key. Your agent calls an endpoint, gets HTTP 402 with x402 payment requirements, pays a few cents in USDC on Base, and gets JSON. If the request fails on my side, the payment isn't settled.
This week I added 19 endpoints. Each one is built on data that may legally be reused, and every response has a sources field so the agent can see where the answer came from.
| Endpoint | Price | What it returns |
|---|---|---|
| /api/llm-pricing | $0.001 | List prices for ~3,000 models (per 1M input/output/cached tokens, context window, vision/tools flags), plus verified free tiers |
| /api/llm-cost | $0.001 | Cost of one job across up to 15 models; tokens from counts or estimated from text |
| /api/mcp-servers | $0.001 | Search 4,259 MCP servers by keyword, category, language, OS, official flag |
| /api/page-check | $0.001 | Status, title, meta, canonical, plus an "agent-friendliness" score (llms.txt, sitemap, JSON-LD, AI-crawler rules in robots.txt) |
| /api/link-check | $0.001 | Status and redirects for up to 20 URLs |
| /api/page-markdown | $0.001 | Page → clean Markdown (respects robots.txt) |
| /api/country | $0.001 | ISO codes, currency, languages, time zones, current local time |
| /api/holidays | $0.001 | Public holidays 2026-2027 by country, or "is this date a holiday?" |
| /api/currency | $0.001 | ECB daily reference rates (~30 currencies), any pair between them |
| /api/base-gas | $0.001 | Current Base gas price and block, from public RPCs |
| /api/email-verify | $0.001 | Syntax, MX/DNS, disposable-domain and role-address flags. No SMTP probing, nothing stored |
| /api/extract-json | $0.001 | Messy text + JSON Schema in, typed JSON out (small LLM on Workers AI, heuristic fallback) |
| /api/x402-services, /api/agent-tools | $0.001 | Search ~8,900 x402 APIs and 4,259 MCP servers |
| /api/dump/* | $5-$9 | Full JSON dumps: MCP directory, model pricing, world reference |
Free, no payment needed: /api/mcp-servers/sample, /api/llm-pricing/sample, /api/x402-services/sample, /openapi.json, /llms.txt, /.well-known/x402. There is also a remote MCP server at /mcp (listed in the official MCP Registry). Its paid tools return the x402 payment details.
Where the data comes from
- Model prices: BerriAI/litellm price table (MIT). These are list prices, so check the provider's page before you commit real spend.
- MCP servers: punkpeye/awesome-mcp-servers (MIT).
- Countries and time zones: GeoNames (CC BY 4.0).
- Holidays: python-holidays (MIT). Lunar and decree-based dates can move.
- Currency: the European Central Bank daily reference rates.
- x402 service list: nohumans.directory (CC BY 4.0).
- Disposable email domains: disposable-email-domains (CC0).
- The page tools only fetch public URLs and send an identifying User-Agent. /api/page-markdown also refuses pages that robots.txt disallows.
No personal data anywhere.
Try it
curl -i "https://freetier-agent-api.pages.dev/api/llm-cost?models=gpt-4o-mini,claude-sonnet-4-5&input_tokens=1000&output_tokens=500&calls=1000"
# -> 402 + PAYMENT-REQUIRED header; pay with any x402 client (@x402/fetch, x402 for Python)
It runs on Cloudflare Pages' free plan, with the data bundled into the worker. Settlement goes through public facilitators, so there are no keys on my side. The endpoints are listed on x402scan, x402dash, 402index and nohumans.directory.
What would you want an agent to be able to buy for a cent? Tell me in the comments. I only add data I can cite.
Want every kit? The All-Access Bundle has 147 kits for $39 (card/PayPal guest checkout).
Mentions
@Dys_hay Alors c'était peut-être punkpeye/awesome-mcp-servers
Nobody can keep up with MCP servers. One repo tracks 4,630 of them in 60 categories. Whatever you want to wire into an agent, someone already built the server. You just have to find it. punkpeye/awesome-mcp-servers
Pay-per-call endpoints for AI agents: model prices, MCP servers, holidays, page checks (x402, USDC on Base) Disclosure: I built this with help from AI tools, and it is my own paid service. Prices and limits below are what the API charges today. I run a small pay-per-call API for AI agents: FreeTier Agent API. There's no signup and no API key. Your agent calls an endpoint, gets HTTP 402 with x402 payment requirements, pays a few cents in USDC on Base, and gets JSON. If the request fails on my side, the payment isn't settled. This week I added 19 endpoints. Each one is built on data that may legally be reused, and every response has a sources field so the agent can see where the answer came from. | Endpoint | Price | What it returns | |---|---|---| | /api/llm-pricing | $0.001 | List prices for ~3,000 models (per 1M input/output/cached tokens, context window, vision/tools flags), plus verified free tiers | | /api/llm-cost | $0.001 | Cost of one job across up to 15 models; tokens from counts or estimated from text | | /api/mcp-servers | $0.001 | Search 4,259 MCP servers by keyword, category, language, OS, official flag | | /api/page-check | $0.001 | Status, title, meta, canonical, plus an "agent-friendliness" score (llms.txt, sitemap, JSON-LD, AI-crawler rules in robots.txt) | | /api/link-check | $0.001 | Status and redirects for up to 20 URLs | | /api/page-markdown | $0.001 | Page → clean Markdown (respects robots.txt) | | /api/country | $0.001 | ISO codes, currency, languages, time zones, current local time | | /api/holidays | $0.001 | Public holidays 2026-2027 by country, or "is this date a holiday?" | | /api/currency | $0.001 | ECB daily reference rates (~30 currencies), any pair between them | | /api/base-gas | $0.001 | Current Base gas price and block, from public RPCs | | /api/email-verify | $0.001 | Syntax, MX/DNS, disposable-domain and role-address flags. No SMTP probing, nothing stored | | /api/extract-json | $0.001 | Messy text + JSON Schema in, typed JSON out (small LLM on Workers AI, heuristic fallback) | | /api/x402-services, /api/agent-tools | $0.001 | Search ~8,900 x402 APIs and 4,259 MCP servers | | /api/dump/* | $5-$9 | Full JSON dumps: MCP directory, model pricing, world reference | Free, no payment needed: /api/mcp-servers/sample, /api/llm-pricing/sample, /api/x402-services/sample, /openapi.json, /llms.txt, /.well-known/x402. There is also a remote MCP server at /mcp (listed in the official MCP Registry). Its paid tools return the x402 payment details. Where the data comes from - Model prices: BerriAI/litellm price table (MIT). These are list prices, so check the provider's page before you commit real spend. - MCP servers: punkpeye/awesome-mcp-servers (MIT). - Countries and time zones: GeoNames (CC BY 4.0). - Holidays: python-holidays (MIT). Lunar and decree-based dates can move. - Currency: the European Central Bank daily reference rates. - x402 service list: nohumans.directory (CC BY 4.0). - Disposable email domains: disposable-email-domains (CC0). - The page tools only fetch public URLs and send an identifying User-Agent. /api/page-markdown also refuses pages that robots.txt disallows. No personal data anywhere. Try it curl -i "https://freetier-agent-api.pages.dev/api/llm-cost?models=gpt-4o-mini,claude-sonnet-4-5&input_tokens=1000&output_tokens=500&calls=1000" # -> 402 + PAYMENT-REQUIRED header; pay with any x402 client (@x402/fetch, x402 for Python) It runs on Cloudflare Pages' free plan, with the data bundled into the worker. Settlement goes through public facilitators, so there are no keys on my side. The endpoints are listed on x402scan, x402dash, 402index and nohumans.directory. What would you want an agent to be able to buy for a cent? Tell me in the comments. I only add data I can cite. Want every kit? The All-Access Bundle has 147 kits for $39 (card/PayPal guest checkout).
Dasturchilar bilishi shart boʻlgan 6 ta GitHub repo 🚀 Dasturchi uchun GitHub’dagi 6 ta sara repo! 🤯🔥 Oʻrganish, loyiha qurish va AI vositalari uchun eng foydali resurslar — hammasi bitta videoda. 📌 Videodagi repolar: 1️⃣ build-your-own-x — mashhur texnologiyalarni noldan oʻzingiz yozib oʻrganing codecrafters-io/build-your-own-x 2️⃣ public-apis — bepul ochiq API’larning katta roʻyxati public-apis/public-apis 3️⃣ rea — AI agentlar uchun teskari muhandislik (MCP server va CLI) morluto/rea 4️⃣ awesome-design-md — DESIGN.md koʻrinishidagi dizayn tizimlari voltagent/awesome-design-md 5️⃣ awesome-mcp-servers — MCP serverlarining tanlangan roʻyxati punkpeye/awesome-mcp-servers 6️⃣ awesome-programming-books — dasturlash boʻyicha kitoblar greyblake/awesome-programming-books ⭐ Foydali boʻlsa, videoni saqlab qoʻying va doʻstlaringizga yuboring. 💬 Qaysi repo sizga eng koʻp yoqdi? Izohlarda yozing! 📲 Meni kuzating: @professor_muhamadxon 🎵 Music provided by NoCopyrightSounds Aisake, Dosi — Cruising #github #dasturlash #opensource #sunʼiyintellekt #mcp #api #dasturchi #oʻzbekiston
Dasturchilar bilishi shart boʻlgan 6 ta GitHub repo 🚀 Dasturchi uchun GitHub’dagi 6 ta sara repo! 🤯🔥 Oʻrganish, loyiha qurish va AI vositalari uchun eng foydali resurslar — hammasi bitta videoda. 📌 Videodagi repolar: 1️⃣ build-your-own-x — mashhur texnologiyalarni noldan oʻzingiz yozib oʻrganing codecrafters-io/build-your-own-x 2️⃣ public-apis — bepul ochiq API’larning katta roʻyxati public-apis/public-apis 3️⃣ rea — AI agentlar uchun teskari muhandislik (MCP server va CLI) morluto/rea 4️⃣ awesome-design-md — DESIGN.md koʻrinishidagi dizayn tizimlari voltagent/awesome-design-md 5️⃣ awesome-mcp-servers — MCP serverlarining tanlangan roʻyxati punkpeye/awesome-mcp-servers 6️⃣ awesome-programming-books — dasturlash boʻyicha kitoblar greyblake/awesome-programming-books ⭐ Foydali boʻlsa, videoni saqlab qoʻying va doʻstlaringizga yuboring. 💬 Qaysi repo sizga eng koʻp yoqdi? Izohlarda yozing! 📲 Meni kuzating: @professor_muhamadxon 🎵 Music provided by NoCopyrightSounds Aisake, Dosi — Cruising #github #dasturlash #opensource #sunʼiyintellekt #mcp #api #dasturchi #oʻzbekiston
8. Awesome MCP Servers Model Context Protocol is the newest skill on JDs. This repo indexes every production MCP server out there. punkpeye/awesome-mcp-servers
A lista awesome-mcp-servers tem 36 servidores jurídicos, e nenhuma entrada cita o Brasil. → Lista curada de conectores MCP, licença MIT → Cada servidor é projeto de terceiro → O porém: estar na lista não é aval de qualidade punkpeye/awesome-mcp-servers t.co
おお、マージされた、うれしい！ awesome-mcp-servers#15209