# Kelly Developers

Build on Kelly's fantasy and betting numbers through the Kelly API, the Kelly Wire stream and, when it opens, the MCP server.

Kelly answers fantasy and betting questions with numbers its engine computes, and every number carries its [provenance](/glossary#provenance): who produced it and when it was true. These docs cover the three ways to build on it.

> Kelly is in a staff-gated beta. API keys go to Kelly staff only, and nothing is charged during the beta. Some operations need no key at all, so anyone can make a first call.

## Start here

- [Authentication](/concepts/authentication): keys, scopes and who can get one.
- [Conventions](/concepts/conventions): versions, IDs, times, paging and the headers every response carries.
- [API reference](/reference): every operation and every Kelly Wire topic, generated from the definitions.

## What answers today

| Operation | Access | Status |
| --- | --- | --- |
| [`GET /health`](/reference/status#get-health) | public | live |
| [`GET /v1/status`](/reference/status#get-status) | public | live |
| [`GET /v1/reference`](/reference/reference#list-reference) | public | live |
| [`GET /v1/reference/{topic_id}`](/reference/reference#get-reference) | public | live |
| [`POST /v1/wire/tickets`](/reference/wire#get-wire-ticket) | public | live |
| [`GET /v1/stream/{topic}`](/reference/wire#stream-topic) | public | live |
| [`POST /v1/answers`](/reference/answers#create-answer) | `run:answers` | live |

The status column comes from the definition's `x-status` field. Until that field is filled in (planned, P8, October 16, 2026), every operation reads "unmarked".

## Choose how you build

- **REST API** at `api.askkelly.ai`: one call per question. See the [API reference](/reference).
- **Kelly Wire** at `wss://wire.askkelly.ai/v1`: live values pushed as they change. See [streaming](/concepts/streaming).
- **MCP server** at `https://mcp.askkelly.ai/mcp`: Kelly's tools inside an AI client. The server is planned and doesn't run yet (P8, October 16, 2026); see [MCP server](/mcp).

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Last updated October 16, 2026

Support: support@askkelly.ai · Security and disclosure: https://docs.askkelly.ai/security

Information is the edge. Odds are information, not advice · 21+ · Get help