MCP MeasureMCP Measure

índice observado

FreeTier Agent API

x402 pay-per-call data for agents: LLM prices, MCP/x402 directories, holidays, FX, page checks

¿Debería usar esto?

Calidad y seguridad

B
Calidad de la descripción
98%
Integridad del esquema
63%
Calidad de los nombres
81%
Riesgo de envenenamiento
100%
Coincidencia de permisos
100%
Cumplimiento del protocolo
100%

Hallazgos (2)

  • LOWTool 'mcp_servers_sample' description lacks action verben mcp_servers_sample
  • LOWTool 'api_directory_sample' description lacks action verben api_directory_sample

Basado en el análisis automatizado de las definiciones de herramientas y el cumplimiento del protocolo.

Costo de contexto

~3,885Tokens (definiciones de herramientas)
~386 BTamaño de respuesta típico
Impacto significativo en la atención (3.04% del contexto de 128k)

Este es el número aproximado de tokens que se consumen cada vez que las herramientas del servidor se cargan en el contexto de un modelo. Los recuentos más altos reducen la atención disponible para otras tareas.

Instalar

Instalación con un clic

Agrega esto a tu archivo `claude_desktop_config.json`:

{
  "mcpServers": {
    "freetier-agent-api": {
      "url": "https://freetier-agent-api.pages.dev/mcp"
    }
  }
}

Puntos de conexión remotos

https://freetier-agent-api.pages.dev/mcpstreamable-http

Qué puede hacer

Inventario de herramientas

Herramientas (28)

🟢 Solo lectura🟡 Escritura🔴 Eliminación⚪ Desconocido
🟢list_endpoints

Free. List every FreeTier Agent API endpoint with price (25 free calls/day then $0.001 USDC via x402 on pay-per-call routes; dumps $5–$9), description and example query.

Esquema de entrada

{
  "type": "object",
  "properties": {}
}
⚪mcp_servers_sample

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

Esquema de entrada

{
  "type": "object",
  "properties": {}
}
🟢llm_pricing_sample

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

Esquema de entrada

{
  "type": "object",
  "properties": {}
}
⚪api_directory_sample

Free. Five live public APIs that need no key.

Esquema de entrada

{
  "type": "object",
  "properties": {}
}
🟢apis_search(q, category, auth, alive, https, ...)

Pay-per-call: 25 free/day then $0.001 USDC via x402. Search 2,230 link-checked public & free-tier APIs (59 categories). Filters: q, category, auth=none, alive=yes, https=yes, kind, limit<=50. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "q": {
      "type": "string",
      "description": "free-text search in name/description/category"
    },
    "category": {
      "type": "string"
    },
    "auth": {
      "type": "string",
      "description": "'none' = no API key"
    },
    "alive": {
      "type": "string",
      "enum": [
        "yes",
        "no"
      ]
    },
    "https": {
      "type": "string",
      "enum": [
        "yes"
      ]
    },
    "kind": {
      "type": "string",
      "enum": [
        "public_api",
        "dev_free_tier",
        "ai_api_free_tier"
      ]
    },
    "limit": {
      "type": "string",
      "description": "1-50, default 10"
    }
  },
  "required": []
}
🟢free_tiers(q, category)

Pay-per-call: 25 free/day then $0.001 USDC via x402. Current free-tier limits for developer services (hosting, DB, auth, email, CI, monitoring) and AI/LLM APIs, with official source URLs. Filter: q, category. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "q": {
      "type": "string"
    },
    "category": {
      "type": "string"
    }
  },
  "required": []
}
🟢robots_check(url, ua)

Pay-per-call: 25 free/day then $0.001 USDC via x402. 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. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "absolute http(s) URL"
    },
    "ua": {
      "type": "string",
      "description": "user-agent token, default *"
    }
  },
  "required": [
    "url"
  ]
}
🟢page_meta(url)

Pay-per-call: 25 free/day then $0.001 USDC via x402. Fetch a public web page (robots.txt respected) and return title, meta description, canonical, Open Graph/Twitter tags, language, headings, link counts, HTTP status. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "absolute http(s) URL"
    }
  },
  "required": [
    "url"
  ]
}
🟢dataset_full

Paid dump ($8 USDC via x402, or buy_with_card in the 402 body). Buy the full Verified API Directory dataset (2,230 rows, JSON, CC BY 4.0 + MIT sources) in one call. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {},
  "required": []
}
🟢llm_pricing(q, provider, vision, tools, free, ...)

Pay-per-call: 25 free/day then $0.001 USDC via x402. 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. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "q": {
      "type": "string"
    },
    "provider": {
      "type": "string"
    },
    "vision": {
      "type": "string",
      "enum": [
        "yes"
      ]
    },
    "tools": {
      "type": "string",
      "enum": [
        "yes"
      ]
    },
    "free": {
      "type": "string",
      "enum": [
        "yes"
      ]
    },
    "max_input_per_m": {
      "type": "string"
    },
    "min_context": {
      "type": "string"
    },
    "sort": {
      "type": "string",
      "enum": [
        "input",
        "output",
        "context"
      ]
    },
    "limit": {
      "type": "string"
    }
  },
  "required": []
}
🟢llm_cost(models, text, input_tokens, output_tokens, calls)

Pay-per-call: 25 free/day then $0.001 USDC via x402. 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. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "models": {
      "type": "string"
    },
    "text": {
      "type": "string"
    },
    "input_tokens": {
      "type": "string"
    },
    "output_tokens": {
      "type": "string"
    },
    "calls": {
      "type": "string"
    }
  },
  "required": []
}
🟢mcp_servers(q, category, language, scope, official, ...)

Pay-per-call: 25 free/day then $0.001 USDC via x402. 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. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "q": {
      "type": "string"
    },
    "category": {
      "type": "string"
    },
    "language": {
      "type": "string"
    },
    "scope": {
      "type": "string",
      "enum": [
        "cloud",
        "local",
        "embedded"
      ]
    },
    "official": {
      "type": "string",
      "enum": [
        "yes"
      ]
    },
    "limit": {
      "type": "string"
    }
  },
  "required": []
}
🟢page_check(url)

Pay-per-call: 25 free/day then $0.001 USDC via x402. 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. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string"
    }
  },
  "required": [
    "url"
  ]
}
🟢link_check(urls)

Pay-per-call: 25 free/day then $0.001 USDC via x402. Check up to 20 URLs in one call: HTTP status, final URL after redirects, redirect count, latency, content-type, ok flag. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "urls": {
      "type": "string",
      "description": "comma-separated absolute URLs, max 20"
    }
  },
  "required": [
    "urls"
  ]
}
🟢country(q)

Pay-per-call: 25 free/day then $0.001 USDC via x402. Country reference lookup by ISO2/ISO3/name: capital, population, area, continent, currency, phone prefix, TLD, languages, neighbours, time zones with current UTC offset and local time. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "q": {
      "type": "string",
      "description": "ISO2, ISO3 or country name"
    }
  },
  "required": [
    "q"
  ]
}
🟢holidays(country, year, date)

Pay-per-call: 25 free/day then $0.001 USDC via x402. Public holidays for ~490 countries/territories for 2026 and 2027; optional date=YYYY-MM-DD answers is_holiday. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "country": {
      "type": "string",
      "description": "ISO2"
    },
    "year": {
      "type": "string",
      "enum": [
        "2026",
        "2027"
      ]
    },
    "date": {
      "type": "string"
    }
  },
  "required": [
    "country"
  ]
}
🟢currency(from, to, amount)

Pay-per-call: 25 free/day then $0.001 USDC via x402. Currency conversion with official ECB euro reference rates (~30 currencies, daily). Params: from, to, amount. Also returns the rate date. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "from": {
      "type": "string"
    },
    "to": {
      "type": "string"
    },
    "amount": {
      "type": "string"
    }
  },
  "required": [
    "from",
    "to"
  ]
}
🟢base_gas

Pay-per-call: 25 free/day then $0.001 USDC via x402. Live Base mainnet gas price (gwei), latest block, and estimated ETH cost of a USDC transfer (~65k gas) and a plain ETH transfer (21k gas). Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {},
  "required": []
}
🟢page_markdown(url)

Pay-per-call: 25 free/day then $0.001 USDC via x402. Convert a public web page to clean Markdown (title, headings, paragraphs, lists, links, code), scripts/nav/footer removed, max ~60k chars. robots.txt respected. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string"
    }
  },
  "required": [
    "url"
  ]
}
🟢dump_mcp_servers

Paid dump ($9 USDC via x402, or buy_with_card in the 402 body). Full MCP server directory dump (4,259 servers, JSON). Source awesome-mcp-servers (MIT). Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {},
  "required": []
}
🟢dump_llm_pricing

Paid dump ($5 USDC via x402, or buy_with_card in the 402 body). Full dump: list prices of ~3,000 AI models (LiteLLM table, MIT) + verified AI/dev free tiers with limits (JSON). Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {},
  "required": []
}
🟢dump_world_reference

Paid dump ($6 USDC via x402, or buy_with_card in the 402 body). Full dump: 252 countries (GeoNames, CC BY 4.0), 418 time zones, ~14,000 public holidays 2026-2027 (python-holidays, MIT). JSON. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {},
  "required": []
}
🟢email_verify(email)

Pay-per-call: 25 free/day then $0.001 USDC via x402. Email address check WITHOUT sending mail or SMTP probing: RFC-style syntax check, domain MX/A records via DNS-over-HTTPS, disposable-domain flag (CC0 blocklist, ~9,900 domains), role-address flag (info@, support@...), free-mail flag. Verdict: deliverable_domain | risky | invalid. Cannot confirm that the mailbox itself exists. Addresses are not stored or logged. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "email": {
      "type": "string",
      "description": "one email address"
    }
  },
  "required": [
    "email"
  ]
}
🟢extract_json(text, schema, mode)

Pay-per-call: 25 free/day then $0.001 USDC via x402. Messy text + JSON Schema in, clean JSON out. Uses a small LLM (Cloudflare Workers AI, Llama 3.1 8B, JSON mode) when available, else a deterministic key:value/regex extractor; the result is type-checked against your schema and missing fields are null. Limits: text <= 6,000 chars, schema <= 30 top-level properties (flat objects, arrays of scalars); the model can misread ambiguous text, so check important values. Params: text, schema (JSON string), mode=auto|heuristic. GET query or POST JSON body. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "text": {
      "type": "string",
      "description": "input text, max 6000 chars"
    },
    "schema": {
      "type": "string",
      "description": "JSON Schema (type object with properties) as a JSON string"
    },
    "mode": {
      "type": "string",
      "enum": [
        "auto",
        "heuristic"
      ]
    }
  },
  "required": [
    "text",
    "schema"
  ]
}
🟢x402_services(q, category, chain, max_price, status, ...)

Pay-per-call: 25 free/day then $0.001 USDC via x402. 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. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "q": {
      "type": "string"
    },
    "category": {
      "type": "string"
    },
    "chain": {
      "type": "string"
    },
    "max_price": {
      "type": "string"
    },
    "status": {
      "type": "string",
      "enum": [
        "verified",
        "unverified"
      ]
    },
    "limit": {
      "type": "string"
    }
  },
  "required": []
}
🟢agent_tools(q, type, limit)

Pay-per-call: 25 free/day then $0.001 USDC via x402. One search across ~13,000 agent tools: 4,259 MCP servers (awesome-mcp-servers, MIT) and ~8,900 x402 pay-per-call APIs (nohumans.directory, CC BY 4.0). Filters: q, type=mcp|x402, limit<=100. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {
    "q": {
      "type": "string"
    },
    "type": {
      "type": "string",
      "enum": [
        "mcp",
        "x402"
      ]
    },
    "limit": {
      "type": "string"
    }
  },
  "required": [
    "q"
  ]
}
🟢dump_x402_services

Paid dump ($6 USDC via x402, or buy_with_card in the 402 body). Full dump: ~8,900 x402 pay-per-call APIs with category, price, chains and probe status (JSON). Data from nohumans.directory, CC BY 4.0, attribution required. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {},
  "required": []
}
🟢dump_agent_tools

Paid dump ($7 USDC via x402, or buy_with_card in the 402 body). Full dump: Agent Tool Directory, ~13,000 MCP servers + x402 APIs in one unified schema (JSON). MIT + CC BY 4.0 sources, attribution included. Calling this tool returns the HTTP request and x402 payment requirements (or use the free quota).

Esquema de entrada

{
  "type": "object",
  "properties": {},
  "required": []
}

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Observaciones recientes

verificadoversión no registrada28 herramientas