API Integration
| Server | Language | Stars | Downloads |
|---|---|---|---|
| OpenAPI Schema Transforms OpenAPI specifications into YAML-formatted tools for exploring API paths, operations, parameters, schemas, and security definitions, enabling seamless API documentation navigation and understanding. | TypeScript | 48 | — |
| OpenAPI Swagger Converter Automatically converts Swagger/OpenAPI specifications into toolsets, enabling interaction with any API without additional coding through secure key management and dynamic request construction. | — | 187 | — |
| openapi-to-mcp Turns any OpenAPI/Swagger API into an MCP server. One MCP tool per endpoint, Streamable HTTP - for AI clients calling your REST API. | TypeScript | 16 | — |
| openapi-toolkit | TypeScript | 2 | — |
| Openaq OpenAQ MCP — wraps OpenAQ v2 API (free, no auth required) | — | — | — |
| OpenBB Widgets Provides comprehensive access to OpenBB's widget development documentation and boilerplate code for building financial dashboard widgets with FastAPI setup, parameter configurations, and working examples like Monte Carlo stock simulations. | — | 7 | — |
| Openbeautyfacts Open Beauty Facts MCP — Open Beauty Facts API (free, no auth, keyless). | — | — | — |
| OpenBolt An MCP server that equips AI agents with a Lightning Network wallet to autonomously navigate and pay for HTTP 402 gated APIs using the L402 protocol. | TypeScript | 2 | — |
| OpenBudget Provides access to Israel's OpenBudget API for querying and searching government financial data including budgets, contracts, and support payments | — | 12 | — |
| Opencages OpenCage forward + reverse geocoding (free key, 2500/day) | — | — | — |
| Opencitations OpenCitations COCI — open-license citation index by DOI | — | — | — |
| OpenClaw Consensus 9-LLM consensus + disagreement scoring + cheapest-route picks to fight hallucinations. | Python | — | — |
| OpenClaw FinOps Verified cloud cost forecasting for AI agents. AWS, GCP, Azure pricing matrix. | — | — | — |
| OpenClaw MCP Ecosystem 9 remote MCP servers on Cloudflare Workers for AI agents. Free tier + Pro API keys. | — | — | — |
| OpenClaw Trust Scorer Solana wallet trust scoring: tier, tx count, balance, liveness. | — | 0 | — |
| openclaw-x402 Drop-in x402 payment middleware for Flask APIs. Machine-to-machine payments on Base chain. | Python | 63 | — |
| OpenClaw量化交易工具集 量化交易MCP工具集，27个工具覆盖策略指标、回测引擎、风控分析和数据管线 | — | — | — |
| opencode-cli-mcp MCP server that wraps opencode CLI's HTTP API (opencode serve) into MCP tools, plus a webapp dashboard. | TypeScript | 0 | — |
| Opencollective Open Collective public collective/transaction data | — | — | — |
| open-computer-use Give any LLM its own computer — Docker sandboxes with bash, browser, docs, and sub-agents | Python | 97 | — |
| opendart-mcp-server OpenDART API MCP Server - 85 Korean disclosure and financial data tools via Model Context Protocol | TypeScript | 1 | — |
| Opendata Canada open.canada.ca — Canada national open-data catalogue (CKAN) | — | — | — |
| @opendata.cat/mcp-server MCP server for querying Catalan public open data — 2,850+ datasets from 14 portals | TypeScript | — | — |
| Opendatasoft Generic Opendatasoft portal client (3000+ public OpenDataSoft instances) | — | — | — |
| Opendata Swiss opendata.swiss MCP — Switzerland's federal open-data portal (CKAN catalogue). | — | — | — |