Feature

Agent Skills

Packaged skills and instructions for AI agents.

31 providers 180 APIs 27 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.

31 API providers on the APIs.io network offer agent skills. The highest-rated are Affinda, Anthropic, Oracle Integration, Ashby, Tomorrow.io.

Providers

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

Exemplar 5 Complete, well-documented, and agent-ready
Affinda Affinda is an Intelligent Document Processing (IDP) platform that uses AI to extract structured data from d... 14 APIs 74.2 Anthropic Anthropic is an AI safety company and creator of the Claude family of large language models (Opus, Sonnet, ... 11 APIs 72.6 Oracle Integration Oracle Integration provides native connectivity to Oracle and non-Oracle Software as a Service (SaaS) and o... 4 APIs 70.3 Ashby Ashby is a modern all-in-one recruiting platform combining Applicant Tracking System (ATS), sourcing/CRM, i... 15 APIs 70.1 Tomorrow.io Tomorrow.io is a Boston-based weather intelligence platform combining a global proprietary numerical weathe... 8 APIs 70.0
Strong 13 Solid coverage with minor gaps
Knock Knock is notifications infrastructure as a service — a product and customer messaging platform you use to p... 14 APIs 69.3 Assembled Assembled is a San Francisco-headquartered support operations platform that unifies workforce management (W... 12 APIs 69.1 Auth0 Auth0 (now part of Okta) is a leading identity-as-a-service platform providing authentication and authoriza... 6 APIs 68.0 Stytch Stytch is an authentication and identity infrastructure provider. Its Consumer and B2B APIs cover passwordl... 3 APIs 67.6 Swell Swell is a customizable, API-first headless commerce platform powering modern B2C, B2B, subscription, and m... 5 APIs 66.8 Okta Okta is the workforce identity incumbent — its Identity Cloud platform (also called the Okta Workforce Iden... 3 APIs 66.6 Omnisend Omnisend is a Lithuanian-headquartered email and SMS marketing automation platform purpose-built for ecomme... 1 API 66.2 reducto-ai Reducto is an AI document-parsing platform that turns unstructured PDFs, images, spreadsheets, slides, and ... 10 APIs 64.7 parcelLab parcelLab is a Munich-headquartered post-purchase experience platform (parcelLab GmbH) used by retailers in... 2 APIs 64.5 Speakeasy The platform to Build APIs your users love. Best in class API tooling for robust SDKs, API docs, Terraform ... 8 APIs 63.5 emnify emnify is a cloud-native global IoT cellular connectivity provider operating its own mobile core and SuperN... 4 APIs 63.2 WorkOS WorkOS is the "Enterprise Ready" identity platform for B2B SaaS — providing AuthKit user management, enterp... 1 API 61.8 Regal Regal is a New York City-based AI Agent Platform purpose-built for contact center operations. The Regal pla... 5 APIs 60.8
Developing 11 Usable, with meaningful gaps to close
Fern Fern is an SDK generation and documentation platform designed for the AI era. It transforms OpenAPI, AsyncA... 1 API 58.6 APIToolkit (Monoscope) APIToolkit (now Monoscope) is an open-source-friendly API observability and monitoring platform that helps ... 5 APIs 58.4 Oxylabs Oxylabs is a Lithuanian (Vilnius-based) web intelligence platform providing premium proxy networks (Residen... 14 APIs 57.7 UserGems UserGems is a San Francisco-based sales intelligence platform that tracks champion job changes and surfaces... 1 API 57.3 Instabug (Luciq) Instabug — now rebranded as Luciq — is an agentic mobile observability platform covering bug reporting, cra... 8 APIs 57.2 arcade-dev Arcade.dev (formerly Arcade AI) is the MCP runtime for production AI agents — a platform that lets agents s... 9 APIs 56.2 Activepieces Activepieces is an open-source, no-code automation platform that enables users to streamline workflows by c... 1 API 56.1 Wrike Wrike is a collaborative work management platform used by 30,000+ organizations. The Wrike Developer Platfo... 5 APIs 55.3 Formant Formant is a San Francisco–based robotics and physical-operations cloud platform that lets companies operat... 4 APIs 53.2 Blobr Blobr is an AI-powered Google Ads management platform that deploys specialized AI agents to automate campai... 1 API 49.0 Mubert Mubert is a generative AI music platform that composes royalty-free, DMCA-free music in real time from mill... 1 API 46.6
Thin 1 Limited public surface area
Factory Factory is an agent-native software development platform whose Droids act as autonomous AI engineers that p... 3 APIs 31.2
Emerging 1 Early or largely undocumented
Decagon Decagon is an enterprise AI customer service platform that builds and operates voice, chat, and email AI ag... 1 API 25.1

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 SDKKnock 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 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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