Feature

Agent Skills

Packaged skills and instructions for AI agents.

32 providers 114 APIs 28 declared variants

Reusable skill packages, agent instructions, or AGENTS.md-style guidance that teach an agent how to use the product correctly. Turns raw endpoints into reliable agent behavior.

32 API providers on the APIs.io network offer agent skills. The highest-rated are Anthropic, Okta, Omnisend, Speakeasy, UserGems.

Providers

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 7 Complete, well-documented, and agent-ready
AnthropicAnthropic is an AI safety company and the creator of the Claude family of large language models (Opus, Sonn...5 published contracts89.0OktaOkta is the workforce identity incumbent — its Identity Cloud platform (also called the Okta Workforce Iden...2 published contracts80.2OmnisendOmnisend is a Lithuanian-headquartered email and SMS marketing automation platform purpose-built for ecomme...19 published contracts73.0SpeakeasySpeakeasy provides an AI control plane platform that lets enterprises govern, secure, and observe AI agents...1 published contract72.6UserGemsUserGems is a San Francisco-based sales intelligence platform that tracks champion job changes and surfaces...1 published contract72.3Auth0Auth0 (now part of Okta) is a leading identity-as-a-service platform providing authentication and authoriza...4 published contracts72.1RegalRegal is a New York City-based AI Agent Platform purpose-built for contact center operations. The Regal pla...6 published contracts70.0
Strong 13 Solid coverage with minor gaps
Apollo.ioApollo.io is a sales intelligence and go-to-market platform combining a database of 240M+ contacts and 30M+...5 published contracts63.6SwellSwell is a customizable, API-first headless commerce platform powering modern B2C, B2B, subscription, and m...2 published contracts63.0StytchStytch is an authentication and identity infrastructure provider. Its Consumer and B2B APIs cover passwordl...3 published contracts62.0WorkOSWorkOS is the "Enterprise Ready" identity platform for B2B SaaS — providing AuthKit user management, enterp...1 published contract61.4KnockKnock is notifications infrastructure as a service — a product and customer messaging platform you use to p...2 published contracts59.7Arcade.devArcade.dev (formerly Arcade AI) is the MCP runtime for production AI agents — a platform that lets agents s...9 published contracts58.7Oracle IntegrationOracle Integration provides native connectivity to Oracle and non-Oracle Software as a Service (SaaS) and o...25 APIs58.2AffindaAffinda is an Intelligent Document Processing (IDP) platform that uses AI to extract structured data from d...4 published contracts57.7OxylabsOxylabs is a Lithuanian (Vilnius-based) web intelligence platform providing premium proxy networks (Residen...1 published contract56.9parcelLabparcelLab is a Munich-headquartered post-purchase experience platform (parcelLab GmbH) used by retailers in...1 published contract56.9AssembledAssembled is a San Francisco-headquartered support operations platform that unifies workforce management (W...4 published contracts56.4ActivepiecesActivepieces is an open-source, no-code automation platform that enables users to streamline workflows by c...2 published contracts56.3Tomorrow.ioTomorrow.io is a Boston-based weather intelligence platform combining a global proprietary numerical weathe...2 published contracts56.3
Developing 6 Usable, with meaningful gaps to close
WrikeWrike is a collaborative work management platform used by 30,000+ organizations. The Wrike Developer Platfo...1 published contract52.3LangWatchLangWatch is an open-source LLM observability, evaluation, and AI agent testing platform. Built around Open...1 published contract50.9FactorialFactorial is an all-in-one HR, payroll, time, talent, finance, and IT management platform headquartered in ...2 published contracts48.4APIToolkit (Monoscope)APIToolkit (now Monoscope) is an open-source-friendly API observability and monitoring platform that helps ...1 published contract47.7emnifyemnify is a cloud-native global IoT cellular connectivity provider operating its own mobile core and SuperN...1 published contract47.2Instabug (Luciq)Instabug — now rebranded as Luciq — is an agentic mobile observability platform covering bug reporting, cra...1 published contract45.6
Thin 3 Limited public surface area
MubertMubert is a generative AI music platform that composes royalty-free, DMCA-free music in real time from mill...1 published contract34.2FormantFormant is a San Francisco–based robotics and physical-operations cloud platform that lets companies operat...1 published contract31.8CrestaCresta (legally Cresta Intelligence, Inc.) is a Palo Alto, California enterprise Customer Experience AI com...1 API31.4
Emerging 3 Early or largely undocumented
FactoryFactory is an agent-native software development platform whose Droids act as autonomous AI engineers that p...3 APIs25.3BlobrBlobr is an AI-powered Google Ads management platform that deploys specialized AI agents to automate campai...1 API16.8DecagonDecagon is an enterprise AI customer service platform that builds and operates voice, chat, and email AI ag...1 API13.6

What Providers Actually Declared

This feature is a canonical term. These are the free-text strings providers wrote in their own apis.yml that map onto it.

50+ Specialized AI AgentsAGENTS.md repository conventionsAI AgentsAI Agents StudioAI agents: Detect Agent, Resolve Agent, Release AgentAI coding-agent skillsAgent SkillsAgent Skills API (beta) — packaged domain expertise with progressive disclosureAuth0 for AI Agents — Token Vault, async auth, Auth for MCP, FGA for RAG (GA, 50% of base)Cresta Conductor — developer-facing agentic engine for building, testing, and optimizing AI agentsFive provider-published agent skills — four in the MCP plug-in, one for the CLIGem-E AI agents for prospect list building and email personalizationIntegrations with AG2, CrewAI, Google ADK, LangChain (Python / TypeScript), Mastra, OpenAI Agents, Spring AI, TanStack AI, and Vercel AI SDKIntegrations — OpenAI, Anthropic, Azure, AWS Bedrock, LiteLLM, LangChain, LangGraph, DSPy, OpenAI Agents, Pydantic AI, CrewAI, Autogen, HaystackKnock skills — procedural knowledge packages for AI agents working with KnockLLMs.txt Indexed DocumentationOfficial Agent Skills for Oxylabs productsOfficial MubertAI/skills repo of Agent Skills (setup, generate, streaming, library, manage)Okta for AI Agents: agent discovery, registration, ownership, least-privilege, revocationPipes: human-approved, provider-scoped credentials for AI agentsPostman public workspace and llms.txt feed for AI-agent friendly discoveryPublic llms.txt and llms-full.txt feeds with inline OpenAPI fragments for AI-friendly documentationSMS, Chat, and WebRTC AI Agents sharing the same prompt, knowledge base, and action libraryUnified workforce management for in-house agents, BPO vendors, and AI agentsis-agent SDK for detecting AI agents / bots client-sidellms.txt endpoint for AI agents at https://apidoc.factorialhr.com/llms.txtllms.txt index for AI-agent consumption of all docs and OpenAPI endpointsskill.md file for AI agents (Claude Code, Cursor) describing the full API surface

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Work with this as data

Every feature here is available over the APIs.io API and to AI agents over MCP. Features is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for features

3 MCP tools reach this
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
Search the catalog 
curl "https://apis.io/api/v1/search?q=agent-skills&limit=10"
Everything under a tag 
curl "https://apis.io/api/v1/tags/agent-skills"

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