AI Catalog manifest · Fly Io

Fly.io

Fly Io serves an AI Catalog manifest at /.well-known/ai-catalog.json on fly.io, declaring 3 agentic resources that a discovery service can index without asking anyone’s permission.

Open the live manifest → Fly Io provider profile
Structural grade · AI Catalog 1.0
Near-Conformant
Correctly shaped — every hard check passes — but optional affordances are missing.
ARD conformance-test v0.9.1 (ards-project/ard-spec)
PASS
Run against this exact body with the project’s own conformance CLI.
Discovery path
predecessor
Answered only at /.well-known/ai-catalog.json. ARD v0.91 renamed the path to /.well-known/ard.json and made the old one an optional courtesy, so a consumer implementing only the current spec will not find this manifest.
Declared spec version
1.0
The specVersion in the manifest. 1.0 is current for the AI Catalog data model; anything lower is an earlier draft. ARD reads this field as transport-defined and ignores it.
Optional affordances missing. None of these break a client, but each one costs the publisher search relevance or verifiability.
3 entries
2 media types
9 representative queries
0 trust manifests
Host identifier: fly.io

What this manifest advertises

Sprites MCP server

urn:air:fly.io:mcp:sprites

Create Sprites, run commands in them, manage services, checkpoints, and network policy.

application/mcp-server+json artifact →

Fly.io Machines API

urn:air:fly.io:openapi:machines

REST API for creating, starting, stopping, and destroying Fly Machines.

application/json artifact →

Fly.io agent skills

urn:air:fly.io:skills:index

Skill documents describing how to use Fly.io and Sprites.

application/json artifact →

How it is served

The publishing guide asks for three things at the transport layer, because a crawler is the consumer that matters and a crawler is a browser-shaped client.
Evidence. Fetched https://fly.io/.well-known/ai-catalog.json on 2026-09-13, HTTP 200. The verbatim body is stored alongside its manifest in the Fly Io repository as ai-catalog/fly-io-ai-catalog.json. Nothing on this page is derived or generated: an AI Catalog manifest is served from the publisher’s own domain or it does not exist, which makes it — like an A2A Agent Card — one of the few agent artifacts that cannot be produced on a provider’s behalf. Grades are recomputed on every build; the specification is a v0.9 draft and these verdicts will move when it does.

Work with this as data

Every descriptor here is available over the APIs.io API and to AI agents over MCP. Agent Discovery 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 agent discovery

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=fly-io&limit=10"
Everything under a tag 
curl "https://apis.io/api/v1/tags/fly-io"

Discovery needs no key. Ratings and market analysis are Pro.

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