Agent Skills — the SKILL.md packages that API providers publish so AI coding agents like Claude Code can operate their products correctly — have crossed from a novelty into an expected provider artifact. We just indexed twenty-seven more providers that launched them, and the skills directory on apis.io now spans 109 providers and 1,489 individual skills.
How we found them
We didn’t go hunting on GitHub. The signal was already in the network: every provider profile on apis.io pulls that company’s blog, and providers announce skills the same way they announce SDKs or an MCP server. Sweeping the blog feeds for launch posts — “Introducing X Agent Skills,” “Now live: X Skills for Claude Code,” “Teach your AI coding agent how to use X” — surfaced the real launches and let us filter out the noise (syndicated re-posts, opinion pieces, generic tutorials). Each confirmed launch got an AgentSkills entry in the provider’s apis.yml, the skill repository was cloned, and every SKILL.md inside it became a page.
What landed
The twenty-seven providers, by number of published skills:
- NVIDIA — 237. A verified, capability-governed catalog spanning cuOpt, clinical ASR, and accelerated computing.
- LambdaTest / TestMu AI — 71. Test-automation skills, including the Appium skill for Claude Code.
- MotherDuck — 56. Teaching agents to do analytics over DuckDB.
- CockroachDB — 33. Onboarding, migrations, query design, operations, and resilience.
- CARTO — 23. Spatial analysis and agentic map-making.
- PubNub — 22, Sinch — 19, Dynatrace — 17, Banuba — 13.
- Confluent — 12 each across the streaming platform and Schema Registry; DatoCMS — 12.
- Stigg — 11, Cloudflare — 11, Neon — 9, MongoDB Atlas — 8, Axiom — 7.
- Postmark — 6, Autodesk Platform Services — 5, Zuplo — 4, and a tail of two-to-three-skill launches from Amazon SES, Checkly, RisingWave, and Spree (25).
It’s a striking spread: a database company and a CDN and a maps platform and a testing cloud all reaching the same conclusion at the same time — that the way to be useful to an agent is to ship the operational knowledge as files the agent can load, not bury it in docs the agent has to guess at.
Why this matters
A SKILL.md is the agent-era cousin of the OpenAPI contract. OpenAPI tells a machine what the API can do; a skill tells the agent how to actually use it well — the gotchas, the sequencing, the idioms a senior engineer would know. Providers are starting to treat it as a first-class deliverable, right alongside SDKs and MCP servers, and a few (Mintlify, Affinda) are even auto-generating a skill.md from their docs.
apis.io indexes skills as their own artifact type so they’re discoverable across the whole catalog — not stranded one GitHub repo at a time. You can browse every provider’s skills, drill into an individual skill’s instructions, and see which providers have made the investment and which haven’t yet.
The takeaway
If you run an API and your competitors are shipping Agent Skills, an agent pointed at both products will be measurably better at theirs. The bar for “agent-ready” moved again, and these twenty-seven providers just cleared it. Browse the full directory at apis.io/skills — and if you’ve shipped a SKILL.md we haven’t indexed yet, tell us and we’ll add it.