Backend and APIs skills

13,259 tagged Backend and APIs, measured the same way as everything else here.

Browse within: LLM 148agents 116skills 116agent 88agentic-ai 85api 80azure 68antigravity 64claude-code-plugin 61ai-coding 56cli 54cursor 54cybersecurity 53javascript 52

add-fetcher

865

koalyptus/ls-apis

Skill Claude CodeCodex

Guide for adding a new API data source fetcher to the ls-apis aggregator.

not rated 1 yesterday A 20 tokens original MIT

mcp

866

jean-baptiste-tiple/mcp-template

Skill Claude Code

MCP : tools serveur MCP, widgets MCP Apps, resources ui://, OAuth 2.1 connecteur, mcp-handler, inspector, pattern prepare/save (zéro IA serveur), éditions en deltas (ops), golden queries, AX. FR : tool MCP, widget dans Claude/ChatGPT, serveur MCP, canal MCP, bridge host, anonymisation/adaptation par le modèle…

not rated 1 29d ago A 86 tokens archived

cohesivity

867

cohesivity-org/cohesivity-plugin

Skill Claude CodeCodex

Backend and infra for a project via Cohesivity (cohesivity.ai). Provisions Postgres, hosting and deploys, auth and social login, realtime websockets, an agent-native email inbox, object and vector storage, Redis, cron, and AI model APIs (OpenAI, Anthropic, Deepgram, Exa) through one HTTP API. Use when a valid…

not rated 1 changed 14d ago A 121 tokens original MIT

mobile-auth-backend

869

almasumdev/awesome-mobile-backend-agent-skills

Skill Claude CodeCodex

Server-side OAuth 2.1 + PKCE for native mobile apps -- authorization endpoint, token endpoint, refresh rotation, and device binding. Use when implementing or reviewing the auth server for mobile clients.

not rated 1 6mo ago A 45 tokens

one-integrations

870

withoneai/one-agent-plugin

Skill Claude CodeCodex

Read and write real data in third-party apps (Gmail, Slack, Stripe, Shopify, HubSpot, QuickBooks, Linear, Notion, Salesforce and 700+ more) through the One MCP server. Use when the user asks to send an email, post a message, look up a customer, pull invoices, create a ticket, sync records, or take any action in an…

not rated 1 27d ago A 95 tokens original MIT

graphql-mcp-server

871

KKonstantinov/graphql2mcp

Skill Claude CodeCodex

Turns GraphQL APIs into MCP tools with the graphql2mcp CLI or the @graphql2mcp/lib library. Use when connecting a GraphQL endpoint to Claude Code, Claude Desktop, Cursor, VS Code or another MCP client; when serving a .graphql SDL file, schema glob or introspection JSON as an MCP server; when exposing selected GraphQL…

not rated 1 18d ago B 99 tokens original MIT

api-response-triage

872

b-hash88/knownfix

Skill Claude CodeCodex

Use to diagnose a failed HTTP API or MCP JSON-RPC response, separating transport, protocol and tool-result failures without retrying writes.

not rated 1 11d ago A 33 tokens

ed-fi-api-client

873

Ed-Fi-Exchange-OSS/Ed-Fi-SDK-for-AI-Assistants

Skill Claude CodeCodex

Guidance for writing, reviewing, auditing, debugging, or fixing any code that acts as an Ed-Fi API client — scripts, CLIs, SDKs, ETL and extract jobs, SIS or data-warehouse integrations. Covers authentication and token handling, the Discovery API, pushing data (POST/PUT/DELETE, dependency order, descriptors), pulling…

not rated 1 changed yesterday A 193 tokens original Apache-2.0

Knuckles-Team/archivebox-api

Skill Claude CodeCodex

Develop and maintain the ArchiveBox connector while preserving its governed API actions, web-source contract, credential boundary, package resources, and public-first release evidence.

not rated 1 changed today A 35 tokens original MIT

askell-mcp

875

Neschadin/askell-mcp

Skill Claude CodeCodex

Operate the askell-mcp server: discovery tools, read vs mutate calls, analysis shortcuts, bundled OpenAPI and webhook resources, prod vs sandbox, and mutation confirmation. Pair with the askell-docs skill for live product docs and traps.

not rated 1 2d ago A 53 tokens original MIT

Knuckles-Team/nextcloud-agent

Skill Claude CodeCodex

Develop and verify nextcloud-agent as a connector-owned package while preserving its SDK Connector wiring, action-routed MCP tools, Nextcloud authentication and TLS boundary, packaged content, and source-backed spec-delivery publication.

not rated 1 yesterday A 47 tokens original MIT

cnd_federal-mcp

877

mcp-dir/cnd_federal-mcp

Skill Claude CodeCodex

Skill da REST API do CND Federal na MCP.AI: 1 endpoint em /api/cndfederal. Emite a Certidão Negativa de Débitos (CND) federal de uma pessoa ou empresa a partir do CPF ou CNPJ. Hospedado pela plataforma, sem credenciais, pague por consulta com crédito pré-pago. Autentique com workspace API key (sklive) gerada em…

not rated 0 2mo ago A 113 tokens original MIT

pipehero

879

pipehero/pipehero-mcp

Skill Claude CodeCodex

Tunnel localhost to a public URL — debug webhooks (inspect and replay captured requests, and via the Pipehero MCP server let the agent read captured webhooks and diagnose failing handlers against the code), expose your own MCP server (Streamable HTTP) so a cloud-only client like Claude.ai or ChatGPT can reach it, or…

not rated 0 changed 9d ago C 190 tokens

build-grok-oauth-mcp

880

0xagentlabs/oauth-mcp-framework

Skill Codex

Build, adapt, debug, and validate dedicated Streamable HTTP MCP tool servers that Grok can connect to by pasting one server URL and completing browser OAuth. Use for Grok Custom Connector MCP projects requiring OAuth discovery, restricted Dynamic Client Registration, Authorization Code with S256 PKCE, rotating refresh…

not rated 0 3mo ago A 83 tokens

free-public-rest-apis

881

aisenseapi/aisense-free-public-rest-apis

Skill Claude CodeCodex

Use this skill whenever the user wants to integrate with, call, test, or learn about the free public REST APIs from AI SENSE AS (aisenseapi.com). Triggers include: requests for current time/datetime/timestamp, random numbers, random colors, passwords, UUIDs, GUIDs, Base64/Base58/Base32 encoding or decoding, JWT…

not rated 0 changed today A 350 tokens original MIT

rest-api

882

dribbaengineering/dribba

Skill Claude CodeCodex

Dribba publishes a versioned, key-free JSON API at https://dribba.com/api/v1 — services, case studies, articles, jobs, company facts and a ballpark project estimate — with RFC 9457 typed errors, IETF RateLimit headers and a published deprecation policy.

not rated 0 2mo ago A 64 tokens original MIT

smplkit

883

smplkit/mcp

Skill Claude CodeCodex

Use smplkit when writing application code that needs feature flags, runtime configuration, dynamic log levels, or audit events — and to operate that same platform from your agent. Two halves that compose. (1) AUTHOR with the smplkit SDKs (Python, TypeScript, Go, Java, C#, Ruby): resolve a feature flag, read a config…

not rated 0 today A 247 tokens original MIT

skills

884

deadsimple-email/deadsimple-email

Skill Claude CodeCodex

Email API for AI agents. Create inboxes, send/receive email, manage threads and webhooks.

not rated 0 changed 1mo ago A 0 tokens original MIT

postbag

885

faahim/postbag

Skill Claude CodeCodex

Use when a site or app needs a form endpoint, contact form, lead capture, or to route submissions to email/Telegram/webhooks.

not rated 0 1mo ago B 31 tokens AGPL-3.0

backendgen

886

SiTouhemi/Backendgen

Skill Codex

Generate, validate, regenerate, and test deterministic NestJS, Prisma, and PostgreSQL backends from compact backendcompiler.dev/v1 YAML or JSON specifications. Use when an AI-built frontend needs a backend, when creating CRUD/auth/organizations/reservations/notifications/webhooks/jobs/uploads features, when changing…

not rated 0 3mo ago A 82 tokens original Apache-2.0

apiany-integration

887

ailingqu/ApiAny.AI-MCP

Skill Codex

Use when a user asks to integrate with APIAny, choose or compare APIAny models, estimate APIAny credits or pricing, migrate OpenAI-compatible clients to APIAny, generate APIAny model usage examples, or run confirmed APIAny image and video tasks through the APIAny MCP server.

not rated 0 4mo ago A 62 tokens original MIT

capabilityhostprotocol/capabilities-txt

Skill Claude CodeCodex

Generate a /capabilities.txt for a project so AI agents can discover what it can do — from its OpenAPI spec or codebase. Use when adding agent-discovery to a web API, SaaS, or app.

not rated 0 1mo ago A 51 tokens

At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: