# Betfair

**Canonical:** https://apis.io/providers/betfair/  
**Website:** https://www.betfair.com  
**APIs profiled:** 7

Betfair operates the world's largest online betting exchange, where customers back and lay outcomes against each other rather than against a bookmaker. The Betfair Exchange API (API-NG) gives automated clients programmatic access to the exchange - navigating markets, retrieving live prices, placing and managing bets, and reading account state. It is exposed as lightweight JSON-RPC and REST operations over HTTPS under https://api.betfair.com/exchange (the Betting, Accounts, and Heartbeat APIs), with a separate real-time Exchange Stream API delivered over a raw SSL/TCP socket (CRLF-delimited JSON, not WebSocket) for low-latency market and order updates. A Historic Data API and a licensed Vendor (affiliate) API round out the platform. Auth combines an Application Key with a session token (ssoid) obtained from Betfair's identity SSO login.

## Kin Score — 39.6 / 100 (developing)

Scored 2026-08-24 under rubric 0.13.0. Trend: flat (-0.3 from 39.9).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 60.0 |
| Governance | 13.6 |
| Contract Governance | 13.6 |
| Operational Transparency | 31.6 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

Regulatory layer — **Securities & Market Data**: 30.0 (matched via tags).

## Agent readiness — 22.6 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | documented |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | derived |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Paid · Self-serve signup — onboarding: self-serve, pricing: paid, trial: no (confidence: high).

## APIs (7)

- **Betfair Exchange Stream API** — Low-latency, subscription-based push of market and order changes over a persistent raw SSL/TCP socket to stream-api.betfair.com:443. The protocol is CRLF-delimited JSON (one JSO...
- **Betfair Vendor API** — The Web Vendor Facility for licensed software vendors building web-based betting applications. Uses an OAuth2-style authorization flow so a vendor's web application can obtain a...
- **Betfair Accounts API** — AccountAPING - account funds, details, statement, and app keys.
- **Betfair Betting API** — SportsAPING - market navigation, prices, and bet placement.
- **Betfair Heartbeat API** — HeartbeatAPING - dead man's switch that cancels unmatched bets.
- **Betfair Historic Data API** — Download purchased historical exchange market data.
- **Betfair Identity API** — Session login, keep-alive, and logout via Betfair identity SSO.

## Agentic access (1)

- **Betfair Agentic Access** — 27 operations · 26 acting

## Security (2)

- **Betfair Authentication** — apiKey · 2 schemes
- **Betfair Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Betfair Plans Pricing**

## Tags

Betting Exchange, Sports Betting, Wagering, Trading, Market Data, JSON-RPC, Streaming

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/betfair/). Scores are computed from the provider's own public artifacts under a published rubric.