Feature

Agent Skills

Packaged skills and instructions for AI agents.

33 providers 644 APIs 29 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.

33 API providers on the APIs.io network offer agent skills. The highest-rated are Ashby, Anthropic, Knock, Okta, Tomorrow.io.

Providers

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

Exemplar 15 Complete, well-documented, and agent-ready
Ashby Ashby is a modern all-in-one recruiting platform combining Applicant Tracking System (ATS), sourcing/CRM, i... 52 APIs 75.3 Anthropic Anthropic is an AI safety company and creator of the Claude family of large language models (Opus, Sonnet, ... 24 APIs 75.0 Knock Knock is notifications infrastructure as a service — a product and customer messaging platform you use to p... 35 APIs 72.2 Okta Okta is the workforce identity incumbent — its Identity Cloud platform (also called the Okta Workforce Iden... 28 APIs 72.0 Tomorrow.io Tomorrow.io is a Boston-based weather intelligence platform combining a global proprietary numerical weathe... 10 APIs 70.2 Affinda Affinda is an Intelligent Document Processing (IDP) platform that uses AI to extract structured data from d... 16 APIs 69.3 Omnisend Omnisend is a Lithuanian-headquartered email and SMS marketing automation platform purpose-built for ecomme... 13 APIs 69.2 Factorial Factorial is an all-in-one HR, payroll, time, talent, finance, and IT management platform headquartered in ... 22 APIs 68.6 Assembled Assembled is a San Francisco-headquartered support operations platform that unifies workforce management (W... 27 APIs 68.4 emnify emnify is a cloud-native global IoT cellular connectivity provider operating its own mobile core and SuperN... 29 APIs 68.3 Auth0 Auth0 (now part of Okta) is a leading identity-as-a-service platform providing authentication and authoriza... 76 APIs 68.0 Stytch Stytch is an authentication and identity infrastructure provider. Its Consumer and B2B APIs cover passwordl... 47 APIs 67.8 parcelLab parcelLab is a Munich-headquartered post-purchase experience platform (parcelLab GmbH) used by retailers in... 8 APIs 67.5 reducto-ai Reducto is an AI document-parsing platform that turns unstructured PDFs, images, spreadsheets, slides, and ... 10 APIs 67.1 WorkOS WorkOS is the "Enterprise Ready" identity platform for B2B SaaS — providing AuthKit user management, enterp... 41 APIs 66.3
Strong 10 Solid coverage with minor gaps
Swell Swell is a customizable, API-first headless commerce platform powering modern B2C, B2B, subscription, and m... 34 APIs 65.7 Speakeasy The platform to Build APIs your users love. Best in class API tooling for robust SDKs, API docs, Terraform ... 20 APIs 64.4 Regal Regal is a New York City-based AI Agent Platform purpose-built for contact center operations. The Regal pla... 8 APIs 62.3 Wrike Wrike is a collaborative work management platform used by 30,000+ organizations. The Wrike Developer Platfo... 17 APIs 61.7 Oxylabs Oxylabs is a Lithuanian (Vilnius-based) web intelligence platform providing premium proxy networks (Residen... 15 APIs 61.6 Oracle Integration Oracle Integration provides native connectivity to Oracle and non-Oracle Software as a Service (SaaS) and o... 25 APIs 60.2 UserGems UserGems is a San Francisco-based sales intelligence platform that tracks champion job changes and surfaces... 3 APIs 59.7 arcade-dev Arcade.dev (formerly Arcade AI) is the MCP runtime for production AI agents — a platform that lets agents s... 8 APIs 58.5 APIToolkit (Monoscope) APIToolkit (now Monoscope) is an open-source-friendly API observability and monitoring platform that helps ... 7 APIs 58.1 Instabug (Luciq) Instabug — now rebranded as Luciq — is an agentic mobile observability platform covering bug reporting, cra... 13 APIs 56.0
Developing 6 Usable, with meaningful gaps to close
LangWatch LangWatch is an open-source LLM observability, evaluation, and AI agent testing platform. Built around Open... 28 APIs 54.0 Fern Fern is an SDK generation and documentation platform designed for the AI era. It transforms OpenAPI, AsyncA... 1 API 53.8 Mubert Mubert is a generative AI music platform that composes royalty-free, DMCA-free music in real time from mill... 6 APIs 51.7 Activepieces Activepieces is an open-source, no-code automation platform that enables users to streamline workflows by c... 9 APIs 49.6 Formant Formant is a San Francisco–based robotics and physical-operations cloud platform that lets companies operat... 7 APIs 49.0 Blobr Blobr is an AI-powered Google Ads management platform that deploys specialized AI agents to automate campai... 1 API 43.5
Thin 2 Limited public surface area
Decagon Decagon is an enterprise AI customer service platform that builds and operates voice, chat, and email AI ag... 1 API 29.5 Factory Factory is an agent-native software development platform whose Droids act as autonomous AI engineers that p... 3 APIs 29.2

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)Gem-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 Center (llms.reducto.ai) and llms.txt for AI-agent friendly documentationLLMs.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 Generationllms.txt endpoint for AI agents at https://apidoc.factorialhr.com/llms.txtllms.txt index at developers.ashbyhq.com/llms.txt — every operation page exposes its OpenAPI definition inline in a fenced JSON blockllms.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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