AI Catalog manifest · Helius

Helius

Helius serves an AI Catalog manifest at /.well-known/ard.json on helius.dev, declaring 3 agentic resources that a discovery service can index without asking anyone’s permission.

Open the live manifest → Helius 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
ard.json
Served at /.well-known/ard.json — the path ARD v0.91 says a consumer MUST fetch.
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
3 media types
9 representative queries
0 trust manifests
Host identifier: helius.dev

What this manifest advertises

Helius MCP server

urn:air:helius.dev:mcp-server:helius-mcp

Helius MCP server card — tool inventory and install metadata for the npm-distributed helius-mcp server (npx helius-mcp@latest).

application/mcp-server-card+json artifact →

Helius A2A agent card

urn:air:helius.dev:agent:a2a

A2A agent card describing Helius's agent surface for programmatic signup, RPC, streaming, and digital asset APIs.

application/a2a-agent-card+json artifact →

Helius OpenAPI catalog

urn:air:helius.dev:api:openapi

Merged OpenAPI description spanning every Helius API surface (Solana RPC + extensions, DAS, Sender, Wallet, Priority Fee, ZK Compression, webhooks).

application/openapi+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://helius.dev/.well-known/ard.json on 2026-09-13, HTTP 200. The verbatim body is stored alongside its manifest in the Helius repository as ai-catalog/helius-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=helius&limit=10"
Everything under a tag 
curl "https://apis.io/api/v1/tags/helius"

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

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