Anyone can add an API to APIs.io. Thirty-six providers have come in through that form since July 25 — better than two a day, and accelerating — and this is the first batch to be profiled, enriched and published.
Nine providers. 405 new artifacts. Not nine links in a directory: nine provider records carrying OpenAPI, MCP servers, authentication, rate limits, error catalogs, data models, conformance and lifecycle detail, each one indexed and scored the same way every other provider in the catalog is.
What landed
| Provider | What it does | Notable surface |
|---|---|---|
| MCP360 | Hosted unified Model Context Protocol gateway from Delta4 Infotech | 38 tool services, 106 tools behind one MCP endpoint |
| iSports API | Key-authenticated football and basketball feeds for sportsbooks and media | The deepest artifact set in the batch |
| RouterPlex | OpenAI- and Anthropic-compatible AI gateway | 39 chat and image models from 14 vendors |
| WebScraping.AI | Rendered HTML, visible text, CSS fragments or LLM-extracted structured data for any URL | Two APIs, LLM extraction built in |
| Device Specs API | Normalized mobile-device specifications | 12,000+ smartphones, 50+ manufacturers |
| ReqKey | Out-of-band API key auth, usage credits, rate limiting and analytics | Infrastructure for teams who sell an API |
| Planomy Tax Data | 2026 US retirement and tax figures as open data | Free and keyless |
| WealthVille | DeFi liquidity-pool scoring across Solana and EVM chains | Public, keyless, agent-native |
| We > Ultrarich | Wealth-inequality comparisons as a public API | Free, non-commercial, no user data collected |
What the batch says about where APIs are going
Three of the nine are agent infrastructure — MCP360 is a gateway whose entire product is MCP, RouterPlex fronts fourteen model vendors behind one OpenAI-compatible surface, and WebScraping.AI sells LLM extraction as an endpoint. A fourth, WealthVille, describes its own surfaces as agent-native. That is nearly half the batch built for something other than a human developer reading documentation.
Three more are open data with no key at all — Planomy publishes the 2026 US tax brackets keyless, We > Ultrarich is free and non-commercial, WealthVille is public. The keyless public API is not dead; it has moved to narrow, single-purpose datasets somebody wanted to be quotable.
And two are infrastructure for other people’s APIs — ReqKey does out-of-band key auth and metering for teams who sell an API, RouterPlex does routing. The API economy keeps growing a layer that exists only to serve other APIs.
On who wrote what
Every artifact in these nine repos carries provenance in its frontmatter recording how it got there: searched when we found it published by the provider, probed when we confirmed it against a live endpoint, and generated or derived when we authored it from what the provider does publish.
Most of what landed here was searched or probed. The rest we wrote, deliberately, because a provider having no published OpenAPI is not a reason to leave the catalog empty — it is a reason to model the surface and say plainly who modeled it. Every provider owns their record and can correct it; write to us and we will.
More are in the queue behind these, and more arrive every day. If yours is one of them, it is coming. If it is not, add it.