# DefaultBench Protocol discovery API

**Canonical:** https://apis.io/apis/defaultbench-com/defaultbench-com-protocol-discovery-api/  
**Provider:** DefaultBench — https://apis.io/providers/defaultbench-com/  
**Base URL:** https://defaultbench.com  
**Documentation:** https://defaultbench.com/docs

DefaultBench Protocol discovery API is one of 12 APIs that [DefaultBench](https://apis.io/providers/defaultbench-com/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Protocol discovery. The published artifact set on APIs.io includes an OpenAPI specification.

Machine-readable service metadata.

## Operations (6)

| Method | Path | Summary |
|---|---|---|
| GET | `/openapi.json` | Get this OpenAPI 3.1.1 document |
| GET | `/llms.txt` | Get concise LLM-oriented service discovery |
| GET | `/llms-full.txt` | Get comprehensive autonomous-client instructions |
| GET | `/.well-known/api-catalog` | Discover API descriptions using RFC 9727 |
| HEAD | `/.well-known/api-catalog` | Inspect API catalog metadata without a body |
| GET | `/.well-known/agent-card.json` | Get the A2A 1.0 Agent Card |

## Machine-readable artifacts (1)

- **OpenAPI** — https://artifacts.apis.io/defaultbench-com/openapi/defaultbench-com-protocol-discovery-api-openapi.yml

## Other DefaultBench APIs (11)

- [DefaultBench A2A API](https://apis.io/apis/defaultbench-com/defaultbench-com-a2a-api/)
- [DefaultBench Attribution API](https://apis.io/apis/defaultbench-com/defaultbench-com-attribution-api/)
- [DefaultBench Bidding API](https://apis.io/apis/defaultbench-com/defaultbench-com-bidding-api/)
- [DefaultBench Discovery API](https://apis.io/apis/defaultbench-com/defaultbench-com-discovery-api/)
- [DefaultBench Evidence API](https://apis.io/apis/defaultbench-com/defaultbench-com-evidence-api/)
- [DefaultBench Market Intelligence API](https://apis.io/apis/defaultbench-com/defaultbench-com-market-intelligence-api/)
- [DefaultBench MCP API](https://apis.io/apis/defaultbench-com/defaultbench-com-mcp-api/)
- [DefaultBench Operations API](https://apis.io/apis/defaultbench-com/defaultbench-com-operations-api/)
- [DefaultBench Rankings API](https://apis.io/apis/defaultbench-com/defaultbench-com-rankings-api/)
- [DefaultBench Supplier activation API](https://apis.io/apis/defaultbench-com/defaultbench-com-supplier-activation-api/)
- [DefaultBench Transparency API](https://apis.io/apis/defaultbench-com/defaultbench-com-transparency-api/)

## Tags

Protocol discovery

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/defaultbench-com/defaultbench-com-protocol-discovery-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/defaultbench-com/.