Tools · API Integration
Best MCP servers for API integration
386 MCP servers in the Official MCP Registry do API integration. 191 can be used as a hosted endpoint, with nothing to install, and 313 publish their source code. First by relevance and readiness: graphql-rest-bridge, Webhook Toolkit and VOC OpenAPI MCP.
| # | Tool | Relevance | Connect | Code | Seen |
|---|---|---|---|---|---|
| 1 | graphql-rest-bridge Cloudflare Workers MCP server: graphql-rest-bridge | In name graphql | HOSTEDLOCAL | Open | 2d ago |
| 2 | Webhook Toolkit Webhook URLs for AI agents: receive, wait for, replay, sign and verify webhooks (Stripe, GitHub…). | In name webhook | HOSTEDLOCAL | Open | 2d ago |
| 3 | VOC OpenAPI MCP VOC OpenAPI gives AI agents authorized review and product data for insights, tagging, and listings. | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 4 | Webhook Tester API Test webhook endpoints — send requests, measure latency, validate responses. x402 micropayment. | In name webhook | HOSTEDLOCAL | Open | 2d ago |
| 5 | Webhook Studio Keyless webhook endpoints: capture, wait, replay, forward, and generate types from real traffic. | In name webhook | HOSTEDLOCAL | Open | 2d ago |
| 6 | Postman MCP Server Give your AI agents trusted access to the full Postman platform. | In name postman | HOSTEDLOCAL | Open | 2d ago |
| 7 | Xynthera AI — JSON invoice, OpenAPI and event checks Signed deterministic checks for supplied JSON invoices, OpenAPI API contracts and JSON events. | In name openapi | HOSTEDLOCAL | — | 12h ago |
| 8 | Revenue Agent — OpenAPI Audit & Change Detection Paid OpenAPI audit and API change detection for agents. $0.10 USDC per analysis via x402 on Base. | In name openapi | HOSTEDLOCAL | — | 2d ago |
| 9 | WebhookTest.net Anonymous webhook capture, inspection, waiting, and response configuration for AI agents. | In name webhook | HOSTEDLOCAL | — | 2d ago |
| 10 | Send HTTP Requests in Bulk: Dataset, CSV or Sheet to REST API Send every row of a dataset, file or Google Sheet to any REST API as its own templated request. | In name rest api | HOSTEDLOCAL | — | 2d ago |
| 11 | Execute aws-key-revoker-webhook-mcp Premium agentic endpoint for aws-key-revoker-webhook-mcp. | In name webhook | HOSTEDLOCAL | — | 2d ago |
| 12 | openapi-lint MCP server (stdio): lint OpenAPI specs with Spectral via the AgentForge API | In name openapi | HOSTEDLOCAL | — | 2d ago |
| 13 | Webhook Admin Send, retry and monitor webhooks: manage endpoints, event types and API keys (OAuth). | In name webhook | HOSTEDLOCAL | — | 2d ago |
| 14 | Webhook Signature Fixture Lab Generates deterministic webhook HMAC-SHA256 fixtures and optionally verifies a supplied signature... | In name webhook | HOSTEDLOCAL | — | 2d ago |
| 15 | webhook-inbox Ephemeral HTTPS inbox for bots: mint URL, capture POSTs, list JSON. TEST. https://inbox.kymac.co | In name webhook | HOSTEDLOCAL | — | 2d ago |
| 16 | tableau-graphql-mcp Ask any Tableau lineage question, in any MCP client, through the Tableau Metadata API. | In name graphql | HOSTEDLOCAL | Open | 4h ago |
| 17 | OpenAPI Lint Lint OpenAPI 3.x documents for missing security, responses, descriptions and versioning. | In name openapi | HOSTEDLOCAL | Open | 1d ago |
| 18 | Sezzlee OpenAPI Expose an OpenAPI document to agents as a search-first tool catalog over your existing API. | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 19 | openapi-mcp Turn any OpenAPI 3 spec into a working MCP server. One file, local (stdio) or remote (HTTP). | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 20 | Webhook.site MCP Server Capture HTTP, email, and DNS callbacks with webhook.site from MCP clients. | In name webhook | HOSTEDLOCAL | Open | 2d ago |
| 21 | Webull OpenAPI MCP server for Webull OpenAPI: trading and market data access for AI assistants | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 22 | x-openapi-flow-mcp OpenAPI lifecycle guard and MCP sidecar for policy-driven API orchestration. | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 23 | mcp-openapi-runner Turn any OpenAPI 3.x spec into callable MCP tools for Claude. No custom integration code needed. | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 24 | nl-openapi-mcp National Library of Korea Seoji OpenAPI search via REST API and local metadata harvesting | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 25 | kci-openapi-mcp KCI (Korea Citation Index) literature & citation search via REST Open API + OAI-PMH | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 26 | kosis-openapi-mcp Korean official statistics (KOSIS) — tables, metadata and observations | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 27 | na-openapi-mcp National Assembly Library of Korea catalog search (books, theses, articles, bills) | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 28 | lsopenapi LS Securities OpenAPI MCP server: Korean + overseas stocks, charts, screeners, portfolio, accounts. | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 29 | mcp-graphql-bridge Bridges any GraphQL API to Claude Code — auto-generates MCP tools via schema introspection. | In name graphql | HOSTEDLOCAL | Open | 2d ago |
| 30 | openapi-scout-mcp Local read-only OpenAPI and Swagger inspection with secret-safe schema summaries. Tools include... | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 31 | postman-echo-mcp HTTP request echo from Postman Echo. No key required. | In name postman | HOSTEDLOCAL | Open | 2d ago |
| 32 | openapi-navigator Navigate and query OpenAPI specs with fuzzy search, pagination, and API testing | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 33 | openapi-dynamic Load OpenAPI 2.x/3.x specs and expose generic tools to discover and call multiple APIs. | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 34 | mcp-graphql-enhanced GraphQL gateway for LLMs. Handles huge GitHub GraphQL & @neo4j/graphql schemas without crashing | In name graphql | HOSTEDLOCAL | Open | 2d ago |
| 35 | mcp-openapi Turn any OpenAPI/Swagger spec into MCP tools — each operation an SSRF-guarded tool. | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 36 | OpenAPI APIs MCP server that fronts any OpenAPI service: discover operations from its spec and call them | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 37 | openapi-sync-mcp Type-safe MCP server for OpenAPI Sync to inspect, validate, and synchronize OpenAPI specs. | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 38 | Swagger MCP Bridge Spring Boot example that exposes SpringDoc OpenAPI operations as safe MCP tools. | In name swagger | HOSTEDLOCAL | Open | 2d ago |
| 39 | github-webhook-mcp MCP server bridging GitHub webhooks via Cloudflare Worker for real-time event streaming | In name webhook | HOSTEDLOCAL | Open | 2d ago |
| 40 | Hookwarden — Webhook Integrity Webhook signature-verification audit. Stripe, GitHub, Shopify, Twilio +17. Local. Deterministic. | In name webhook | HOSTEDLOCAL | Open | 2d ago |
| 41 | openapi Turn any OpenAPI/Swagger spec into MCP tools. Zero config, zero code. | In name openapi | HOSTEDLOCAL | Open | 2d ago |
| 42 | graphql Turn any GraphQL API into MCP tools. Zero config, zero code. | In name graphql | HOSTEDLOCAL | Open | 2d ago |
| 43 | webhook-ai-mcp Webhook Ai tools for AI agents. Capabilities: validate webhook signature, log webhook event, replay | In name webhook | HOSTEDLOCAL | Open | 2d ago |
| 44 | bridge Create hosted MCP servers from any OpenAPI spec. Requires a free Kaiva Bridge account. | In description openapi | HOSTEDLOCAL | Open | 1h ago |
| 45 | FluxProof Evidence-bearing public webpage monitoring with hashes, diffs, signed webhooks, REST, and MCP. | In description webhooks | HOSTEDLOCAL | Open | 1h ago |
| 46 | anythingmcp 258 connectors + any REST/SOAP/GraphQL/SQL as MCP tools for Claude & ChatGPT. Self-hosted, AGPL. | In description graphql | HOSTEDLOCAL | Open | 3h ago |
| 47 | shipmail-mcp Shipmail MCP server for AI agent custom-domain email inboxes with REST API and webhooks. | In description rest api | HOSTEDLOCAL | Open | 6h ago |
| 48 | Barevalue Submit podcast orders, check status, and manage webhooks via Barevalue editing API. | In description webhooks | HOSTEDLOCAL | Open | 15h ago |
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FAQ
What is the best MCP server for API integration?
By relevance and readiness, graphql-rest-bridge, Webhook Toolkit and VOC OpenAPI MCP come first: the use case appears in their name and they can be used as a hosted endpoint. Check each page for how to connect and what keys it needs.
How many MCP servers are there for API integration?
Electra Index lists 386 active MCP servers for API integration from the Official MCP Registry. 191 offer a hosted endpoint and 313 publish their source code.
Is there a hosted MCP server for API integration, with nothing to install?
Yes. graphql-rest-bridge, Webhook Toolkit and VOC OpenAPI MCP declare a remote endpoint you add to your assistant's MCP settings.
Is there a ready-made AI agent for API integration instead?
Yes. If you prefer a finished product to plugging tools into your own assistant, Jamie, MeetGeek and Ramp (AI agents) do this out of the box.
How this list is ordered: a tool comes first when the use case appears in its name rather than only in its description, then when it offers a hosted endpoint, then when its source code is public, then by how recently our robot saw it in the Official MCP Registry. The match to API Integration comes from the publisher's description (keyword method), not from a test of the tool. Only active tools with a real description are listed. No tool pays to appear here.