Zyla API Hub

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Discover and call 10,000+ production APIs from one MCP server. Pay-per-call billing for AI agents.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "Zyla API Hub": {
      "url": "https://mcp.zylalabs.com/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (8)

• search_catalog

  Use this FIRST whenever the user needs live, real-world or external data you do not have: train or flight status, weather, prices, stocks, currency rates, company or person lookups, social media data, validation, scraping and more. Semantic search across ALL 10,000+ public APIs on Zyla API Hub. Natural-language queries work best (e.g. "trains departing from a station now", "validate an email address", "get stock prices"). Returns matching APIs ranked by relevance with their ID, name, description, category, price per successful call (USD), average latency (ms), and endpoints summary.

  Parameters:

  • query (required) — string — What you need, in natural language (e.g. "validate an email address", "currency conversion", "weather forecast by city")
  • limit — number — Max results to return (default: 10)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• get_api_info

  Get full details of a specific Zyla API by its numeric ID. Returns the API name, description, category, price per successful call (USD), average latency (ms), and all endpoints with their parameters, example values, and a formal JSON Schema (input_schema) for argument validation.

  Parameters:

  • api_id (required) — number — The numeric API ID (e.g. 781)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• call_api

  Call an API endpoint on Zyla API Hub. Requires the user's API key and a credit card on file. Billing is pay-per-successful-request: you only pay for 2xx responses. Each API has its own price per call (shown in get_api_info), and every successful response includes cost_usd — the exact amount billed for that call. There is no monthly fee and no minimums. Usage is charged to the credit card automatically; call account_status for the billing mode in effect and the amount accrued this cycle. If a 402 error is returned with a payment_url, the user MUST open that URL in their browser to add a credit card before retrying. Pass the api_id, endpoint_id, HTTP method, and parameters.

  Parameters:

  • api_id (required) — number — The numeric API ID
  • endpoint_id (required) — number — The numeric endpoint ID within the API
  • method — string — HTTP method: GET or POST (default: GET)
  • params — object — Key-value parameters to send with the request

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• browse_catalog

  Browse the full Zyla API Hub catalog with pagination. Use this to explore ALL public APIs beyond the top 500. Supports filtering by category and search keyword. Returns paginated results with total count and page info. Results come already ranked: the default "featured" sort is the marketplace order (relevance_score, refreshed daily), so take the list as-is to pick the top APIs.

  Parameters:

  • page — number — Page number (default: 1)
  • sort — string — Sort order: "featured" (marketplace Featured order by relevance_score), "popularity" (usage only), "newest", or "name" (default: featured)
  • search — string — Search keyword to filter APIs by name or description (server-side search across ALL public APIs)
  • category — string — Filter by category name (use list_categories to see available categories)
  • per_page — number — Results per page (default: 20, max: 100)
  • include_params — boolean — If true, include full endpoint parameters in the response (default: false, to keep responses compact)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_categories

  List all available API categories on Zyla API Hub with the real count of public APIs in each. Use the category names returned here as the "category" parameter in browse_catalog to filter APIs by category. Example categories: Sports, Finance, Data, Science, etc.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• register

  Register a new Zyla API Hub account directly from the AI agent. Returns an API key AND a payment_url. The user MUST open the payment_url in their browser to add a credit card before making any API calls. Billing model: pay-per-successful-request with no monthly fee and no minimums. Each API has its own per-call price. The card is only ever charged for actual usage; call account_status to see the billing mode in effect and the amount accrued this cycle. No authentication required to call this tool.

  Parameters:

  • name (required) — string — Full name of the user
  • email (required) — string — Email address (must be unique)
  • password (required) — string — Password (min 8 characters)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• account_status

  Check the current user's account status, billing, and usage. Returns plan info, API call count, the amount consumed this billing cycle in USD (amount_consumed_this_cycle_usd), the billing mode in effect (billing_mode), whether a credit card is on file, and any failed/pending payments. Use this to diagnose why API calls are blocked (missing card or failed payment). Requires the user's API key in the Authorization header.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• get_payment_url

  Get a Stripe Checkout URL so the user can add or update their credit card. REQUIRED after registration and whenever a 402 error occurs. The user must open the returned URL in their browser to add/update their card. Billing is pay-per-successful-request: no monthly fee, no minimums. You are only charged for successful API responses (2xx). Prices vary per API (see get_api_info). API calls are blocked until a valid credit card is on file.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

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Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.