# Sandbox Contractor Agent REST API

**Canonical:** https://apis.io/apis/elonsusk-com/sandbox-contractor-agent-rest-api/  
**Provider:** Artem / A2A Sandbox — https://apis.io/providers/elonsusk-com/  
**Documentation:** https://a2a.elonsusk.com/docs

Sandbox Contractor Agent REST API is one of 2 APIs that [Artem / A2A Sandbox](https://apis.io/providers/elonsusk-com/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include x402, Agentic Commerce, Developer Tools, Blockchain, and Security. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

The HTTP surface of the Sandbox Contractor Agent, published as an OpenAPI 3.1.0 document (FastAPI, info.title "A2A Autonomous Trader Agent", version 0.1.0) at https://a2a.elonsusk.com/openapi.json with Swagger UI at /docs and ReDoc at /redoc. 24 operations across 24 paths: the x402 pay-per-call gate POST /x402/{skill} (27 priced skills; an unpaid call returns HTTP 402 with a PAYMENT-REQUIRED header and x402 v2 PaymentRequirements for USDC on Base eip155:8453 and Solana), the quote-first task API (POST /v1/tasks creates a task and returns a quote plus a multi-chain crypto invoice, GET /v1/tasks and GET /v1/tasks/{task_id} read state, POST /v1/tasks/{task_id}/mark-paid), a public lead-intake form (POST /v1/leads), payment-provider webhooks (POST /v1/payments/webhook/{provider} for NOWPayments and CoinGate), the well-known discovery documents (agent card, agents manifest, x402 discovery), live /health, /healthz and /v1/metrics, and a set of showcase pages. No authentication scheme is declared or used; access is gated by payment.

## Operations (23)

| Method | Path | Summary |
|---|---|---|
| GET | `/.well-known/agent-card.json` | Agent Card |
| GET | `/.well-known/agent.json` | Agent Card Alias |
| GET | `/.well-known/agents.json` | Agents Manifest |
| GET | `/.well-known/402index-verify.txt` | Well Known 402Index Verify |
| GET | `/.well-known/x402.json` | X402 Discovery |
| POST | `/x402/{skill}` | X402 Pay Per Call |
| POST | `/v1/tasks` | Create Task |
| GET | `/v1/tasks` | List Tasks |
| GET | `/v1/tasks/{task_id}` | Get Task |
| POST | `/v1/tasks/{task_id}/mark-paid` | Mark Paid |
| POST | `/v1/payments/webhook/{provider}` | Payment Webhook |
| POST | `/a2a` | Jsonrpc |
| GET | `/health` | Health |
| GET | `/healthz` | Healthz |
| GET | `/healthz.earn.superteam` | Healthz Earn Superteam |
| GET | `/v1/metrics` | Metrics |
| POST | `/v1/leads` | Create Public Lead |
| GET | `/showcase/zeroclaw` | Zeroclaw Showcase |
| GET | `/showcase/zeroclaw/one-pager` | Zeroclaw One Pager |
| GET | `/showcase/zeroclaw/readme` | Zeroclaw Readme |
| GET | `/showcase/zeroclaw/video-shot-list` | Zeroclaw Video Shot List |
| GET | `/showcase/zeroclaw/artifacts.zip` | Zeroclaw Artifacts Zip |
| GET | `/` | Root |

## Machine-readable artifacts (8)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/elonsusk-com/refs/heads/main/openapi/elonsusk-com-openapi.json
- **OpenAPI** — https://a2a.elonsusk.com/openapi.json
- **Documentation** — https://a2a.elonsusk.com/docs
- **APIReference** — https://a2a.elonsusk.com/redoc
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/elonsusk-com/refs/heads/main/overlays/elonsusk-com-openapi-overlay.yaml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/elonsusk-com/refs/heads/main/errors/elonsusk-com-problem-types.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/elonsusk-com/refs/heads/main/data-model/elonsusk-com-data-model.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/elonsusk-com/refs/heads/main/apis.yml

## Other Artem / A2A Sandbox APIs (1)

- [Sandbox Contractor Agent (A2A)](https://apis.io/apis/elonsusk-com/sandbox-contractor-agent-a2a/)

## Tags

x402, Agentic Commerce, Developer Tools, Blockchain, Security

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