# API Bridge

> API Bridge is a credit-metered REST API (and MCP server) for B2B company data: website qualification, one-call enrichment, professional email discovery, page text, questions about a website and search in the official French company registry.

Base URL `https://tools.epsimo.org`. Send JSON with the API key in the `x-token` header (free key with 100 credits per month at https://tools.epsimo.org/#signup). Each successful call costs credits; check the balance with `GET /usage`. Credits, rate limits, errors and MCP setup: https://tools.epsimo.org/llms-full.txt

## Functions

- [Company qualification](https://tools.epsimo.org/docs/qualify.md): Industry, target audience, market and a value proposition from any company website. (4 credits, 1 cached)
- [One-call enrichment](https://tools.epsimo.org/docs/enrich.md): Registry record, qualification and a professional email in a single request. (8 credits, 3 cached)
- [Ask the site](https://tools.epsimo.org/docs/question.md): A short, grounded answer about a company website, without reading it yourself. (3 credits)
- [Page extraction](https://tools.epsimo.org/docs/scrape.md): The main text of any page, direct fetch with a headless-browser fallback. (2 credits)
- [Email discovery](https://tools.epsimo.org/docs/email-verify.md): The most likely professional address, inferred from published patterns — never probed. (2 credits)
- [French company search](https://tools.epsimo.org/docs/entreprise.md): 10M+ companies: name, activity, size, headcount, revenue and directors. (1 credit)
- [Geo search](https://tools.epsimo.org/docs/entreprise-geo.md): Every company around a GPS point, with radius and activity filters. (1 credit)
- [Balance and usage](https://tools.epsimo.org/docs/usage.md): Free and purchased credits, monthly quota and per-route usage this month. (free)
- [Health Check](https://tools.epsimo.org/docs/health.md): Service status. Free, no key needed. (free)

## Reference

- [Full reference for agents](https://tools.epsimo.org/llms-full.txt): every function, credits, rate limits, errors, MCP
- [OpenAPI 3 schema](https://tools.epsimo.org/openapi.json): machine-readable request and response models
- [MCP server](https://tools.epsimo.org/mcp): Streamable HTTP endpoint (POST, JSON-RPC)
- [Interactive docs](https://tools.epsimo.org/docs): Swagger UI
- [Agent docs page](https://tools.epsimo.org/agents): these files, with copy buttons

## Optional

- [Epsimo Apify actors](https://epsimo.org/llms.txt): lead generation actors on the Apify Store