1,406 tagged Backend and APIs, measured the same way as everything else here.
Browse within: mcp-server 202model-context-protocol 139LLM 51api 43ai-tools 31cli 29fintech 23email 19openapi 19agentic-ai 18x402 18claude-desktop 17agentic-commerce 16fastapi 15
MCP server Claude CodeCodexCursor +2
KISS MCP server that maps OpenAPI v3 specs 1:1 onto MCP tools, transparently to spec changes. Runs locally from the transparent-openapi-mcp Python package.
MCP server Claude CodeCodexCursor +2
A locally running MCP bridge for YApi, a tool for managing projects and API documentation. It can query and maintain YApi projects and interfaces.
MCP server Claude CodeCodexCursor +2
MCP server for IMAP/SMTP email access with environment-based configuration. Runs locally from the mcp-mail-server npm package.
MCP server Claude CodeCodexCursor +2
Rango is a spicey API to Django with some extras. Runs locally from the rango Python package.
MCP server Claude CodeCodexCursor +2
MCP server "smart-fhir-mcp" as configured in swami8791/smart-fhir-mcp. Runs locally from the smart-fhir-mcp npm package.
precise-alloy/cms-test-data-mcp
MCP server Claude CodeCodexCursor +2
MCP server that turns a content plan into an importable Optimizely CMS 12 .episerverdata package. An independent community project, not affiliated with or endorsed by Optimizely. Runs locally from the cms-test-data-mcp npm package.
MCP server Claude CodeCodexCursor +2
Hono adapter for the apcore AI-Perceivable module ecosystem. Runs locally from the hono-apcore npm package.
MCP server Claude CodeCodexCursor +2
Any OpenAPI spec. Zero config. Claude-ready. MCP server that turns any REST API into Claude-callable tools instantly. Runs locally from the blobfish-mcp npm package.
MCP server Claude CodeCodexCursor +2
Node.js SDK and MCP server for the Maillog email API. Runs locally from the @maillog/node-sdk npm package.
MCP server Claude CodeCodexCursor +2
Model Context Protocol server for the Keycloak Admin REST API. Runs locally from the @mgcrea/mcp-keycloak npm package.
MCP server Claude CodeCodexCursor +2
A self-hosted MCP server for configuring sipgate accounts through the sipgate REST API v2. Runs locally from the sipgate-mcp npm package.
xiaohuxi/openapi-contract-guard-mcp
MCP server Claude CodeCodexCursor +2
MCP server "openapi-contract-guard-mcp" as configured in xiaohuxi/openapi-contract-guard-mcp. Runs locally from the openapi-contract-guard-mcp Python package.
MCP server Claude CodeCodexCursor +2
Servidor MCP que acompaña la integración con Hilo: contrato de la API, validación de payloads, verificación de webhooks y pruebas contra sandbox. Runs locally from the @cenzontle/hilo-mcp npm package.
cerberusgamelabs/cgl-interagentmail
MCP server Claude CodeCodexCursor +2
File-backed mail, MCP tools, push delivery, and authenticated browser messaging for Codex agents. Runs locally from the cgl-interagentmail Python package.
MCP server Claude CodeCodexCursor +2
Discovery, OAuth, project operations, and exact project MCP handoff for Spala backend projects. Remote server at mcp.spala.ai.
MCP server Claude CodeCodexCursor +2
Give AI agents access to form submissions — read, search, update, and process file attachments. Remote server at app.formester.com.
MCP server Claude CodeCodexCursor +2
Create and wire up contact forms from your coding agent. Forms, snippets, and submissions. Runs locally from the formpaste-mcp npm package. Needs 1 environment variable to run.
keumbang/goldpopcon-openapi-mcp
MCP server Claude CodeCodexCursor +2
A local MCP server for the Keumbang Open API, with a description partly provided in Korean. It supports looking up API specifications and creating, signing, and checking JWT-based request code.
MCP server Claude CodeCodexCursor +2
Build, preview and publish full-stack web apps with TakoCode's hosted coding agent. Remote server at takocode.com.
MCP server Claude CodeCodexCursor +2
Test webhook endpoints — send requests, measure latency, validate responses. x402 micropayment. Remote server at webhook-tester.api.klymax402.com.
MCP server Claude CodeCodexCursor +2
Webhook Ai tools for AI agents. Capabilities: validate webhook signature, log webhook event, replay events. Built by MEOK AI Labs. Runs locally from the webhook-ai-mcp Python package.
RudrenduPaul/agent-observability
MCP server Claude CodeCodexCursor +2
AI agent observability with deterministic record/replay — capture any LangGraph or OpenAI Agents SDK run, replay it offline at zero API cost. Runs locally from the agent-observability-trace-cli Python package.
MCP server Claude CodeCodexCursor +2
MCP server for paas.build — an AI agent can create a real merchant account (sandbox + production), mint checkout tokens and take a business live in one session. Payments for AI builders, 3.9% flat. Runs locally from the @paasbuild/mcp npm package. Needs 1 environment variable to run.
MCP server Claude CodeCodexCursor +2
APITier utility APIs as MCP tools: validation, UK/India address lookup, barcode/QR, data conversion. Runs locally from the @apitier/mcp-server npm package. Needs 7 environment variables to run.