# LVL LTD Agent Skill Market API

**Canonical:** https://apis.io/apis/lvlltd-com/lvl-ltd-agent-skill-market-api/  
**Provider:** LVL LTD CO — https://apis.io/providers/lvlltd-com/  
**Base URL:** https://lvlltd.com  
**Documentation:** https://lvlltd.com/docs/

LVL LTD Agent Skill Market API is one of 3 APIs that [LVL LTD CO](https://apis.io/providers/lvlltd-com/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Agent Skills, x402, Micropayments, Agentic Commerce, and Marketplace. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

REST contract for the x402 skill marketplace: health and readiness probes, the ESP (Evaluate -> Settle -> Prove) protocol root, catalog search and the full catalog.json, free per-skill outline.json and sample.md, the HTTP 402 payment challenge and X-PAYMENT unlock on /api/pay, the public confirmed-unlock proof ledger, AP2 mandates, ERC-8004 agent identity, access resolution, recurring plans, metered budgets, bundles, trust scorecards, security scans, eval scores, demand signals and a revenue rollup. 32 operations across 26 paths, published as OpenAPI 3.1.0 at https://lvlltd.com/openapi.json with servers[] https://lvlltd.com. The published spec carries no operationIds and no securitySchemes; the overlay in overlays/ adds both.

## Operations (32)

| Method | Path | Summary |
|---|---|---|
| GET | `/api/health` | Liveness |
| GET | `/api/ready` | Readiness |
| GET | `/api/esp` | ESP protocol — Evaluate → Settle → Prove |
| GET | `/api/judges` | Recursive evaluator market (ESP judges) |
| GET | `/api/intent` | NL intent → ranked skills |
| GET | `/api/shop` | Unified agent entry |
| GET | `/catalog.json` | Full skill catalog (source of truth) |
| GET | `/api/catalog` | Search catalog |
| GET | `/api/pay` | x402 payment challenge (HTTP 402) |
| POST | `/api/pay` | Unlock sealed pack after Base USDC payment |
| GET | `/api/proof` | Confirmed unlock ledger (never fabricated) |
| GET | `/api/mcp` | MCP server info / tools list |
| POST | `/api/mcp` | MCP JSON-RPC |
| GET | `/api/a2a` | A2A agent card pointer |
| POST | `/api/a2a` | A2A JSON-RPC |
| GET | `/.well-known/agent.json` | Signed A2A Agent Card |
| GET | `/api/mandates` | List AP2 mandates for wallet |
| POST | `/api/mandates` | Create/revoke AP2 mandate |
| GET | `/api/agent-identity` | ERC-8004 identity + local reputation (additive) |
| GET | `/api/access` | Access resolution (one-time / sub / meter) |
| GET | `/api/subscribe` | Recurring plans |
| POST | `/api/subscribe` | Start/renew/cancel subscription |
| GET | `/api/meter` | Meter budget / per-call challenge |
| POST | `/api/meter` | Set cap or record metered use |
| GET | `/api/bundles` | Composable skill stacks |
| GET | `/api/trust` | Trust scorecards |
| GET | `/api/security` | Security scan results |
| GET | `/api/eval` | Eval suite scores |
| GET | `/api/signals` | Confirmed demand signals |
| GET | `/api/revenue` | Revenue rollup (confirmed only) |
| GET | `/skills/{id}/outline.json` | Free skill outline |
| GET | `/skills/{id}/sample.md` | Free skill sample |

## Machine-readable artifacts (6)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/lvlltd-com/refs/heads/main/openapi/lvlltd-com-openapi.yml
- **OpenAPI** — https://lvlltd.com/openapi.json
- **Documentation** — https://lvlltd.com/docs/
- **APIReference** — https://lvlltd.com/docs/REFERENCE.md
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/lvlltd-com/refs/heads/main/overlays/lvlltd-com-openapi-overlay.yaml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/lvlltd-com/refs/heads/main/apis.yml

## Other LVL LTD CO APIs (2)

- [LVL LTD MCP Server](https://apis.io/apis/lvlltd-com/lvl-ltd-mcp-server/)
- [LVL LTD Skill Market A2A Agent](https://apis.io/apis/lvlltd-com/lvl-ltd-a2a-agent/)

## Tags

Agent Skills, x402, Micropayments, Agentic Commerce, Marketplace

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