# 0xArchive Web3 Authentication API

**Canonical:** https://apis.io/apis/0xarchive/0xarchive-web3-authentication-api/  
**Provider:** 0xArchive — https://apis.io/providers/0xarchive/  
**Base URL:** https://api.0xarchive.io  
**Documentation:** https://docs.0xarchive.io/rest-api

0xArchive Web3 Authentication API is one of 55 APIs that [0xArchive](https://apis.io/providers/0xarchive/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Web3 Authentication. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a getting-started guide, authentication docs, and rate-limit docs.

SIWE authentication for existing wallet accounts and autonomous paid wallet access via x402. Standard Free accounts are created through the browser signup flow.

## Operations (6)

| Method | Path | Summary |
|---|---|---|
| POST | `/v1/auth/web3/challenge` | Get SIWE challenge message |
| POST | `/v1/web3/signup` | Wallet free signup retired |
| POST | `/v1/web3/keys` | List API keys for wallet |
| POST | `/v1/web3/keys/revoke` | Revoke an API key |
| POST | `/v1/web3/subscribe` | Start Build or Pro access via x402 USDC payment |
| POST | `/v1/auth/web3/verify` | Verify SIWE signature |

## Machine-readable artifacts (22)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/0xarchive/refs/heads/main/openapi/0xarchive-web3-authentication-api-openapi.yml
- **Documentation** — https://docs.0xarchive.io/rest-api
- **GettingStarted** — https://docs.0xarchive.io/quickstart
- **Authentication** — https://docs.0xarchive.io/authentication
- **APIKeys** — https://0xarchive.io/signup
- **RateLimits** — https://docs.0xarchive.io/rate-limits
- **Errors** — https://docs.0xarchive.io/errors
- **Reliability** — https://docs.0xarchive.io/rest-api/reliability
- **DataCoverage** — https://0xarchive.io/.well-known/data-coverage.json
- **DataSamples** — https://0xarchive.io/.well-known/data-samples.json
- **SDKs** — https://docs.0xarchive.io/sdks
- **CLI** — https://docs.0xarchive.io/cli
- **WalletAccess** — https://docs.0xarchive.io/wallet-automation
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/0xarchive/refs/heads/main/errors/0xarchive-problem-types.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/0xarchive/refs/heads/main/data-model/0xarchive-data-model.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/0xarchive/refs/heads/main/conventions/0xarchive-conventions.yml
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/0xarchive/refs/heads/main/authentication/0xarchive-authentication.yml
- **RateLimits** — https://raw.githubusercontent.com/api-evangelist/0xarchive/refs/heads/main/rate-limits/0xarchive-rate-limits.yml
- **Lifecycle** — https://raw.githubusercontent.com/api-evangelist/0xarchive/refs/heads/main/lifecycle/0xarchive-lifecycle.yml
- **Sandbox** — https://raw.githubusercontent.com/api-evangelist/0xarchive/refs/heads/main/sandbox/0xarchive-sandbox.yml
- **CLI** — https://raw.githubusercontent.com/api-evangelist/0xarchive/refs/heads/main/cli/0xarchive-cli.yml
- **SDKs** — https://raw.githubusercontent.com/api-evangelist/0xarchive/refs/heads/main/packages/0xarchive-packages.yml

## Other 0xArchive APIs (12)

- [0xArchive WebSocket API](https://apis.io/apis/0xarchive/0xarchive-websocket-api/)
- [0xArchive Hosted MCP](https://apis.io/apis/0xarchive/0xarchive-hosted-mcp/)
- [0xArchive Data Quality API](https://apis.io/apis/0xarchive/0xarchive-data-quality-api/)
- [0xArchive HIP-3 Builder Perps - Breadth API](https://apis.io/apis/0xarchive/0xarchive-hip-3-builder-perps-breadth-api/)
- [0xArchive HIP-3 Builder Perps - Candles API](https://apis.io/apis/0xarchive/0xarchive-hip-3-builder-perps-candles-api/)
- [0xArchive HIP-3 Builder Perps - Convenience API](https://apis.io/apis/0xarchive/0xarchive-hip-3-builder-perps-convenience-api/)
- [0xArchive HIP-3 Builder Perps - Full-Depth L2 Order Book API](https://apis.io/apis/0xarchive/0xarchive-hip-3-builder-perps-full-depth-l2-order-book-api/)
- [0xArchive HIP-3 Builder Perps - Funding API](https://apis.io/apis/0xarchive/0xarchive-hip-3-builder-perps-funding-api/)
- [0xArchive HIP-3 Builder Perps - Instruments API](https://apis.io/apis/0xarchive/0xarchive-hip-3-builder-perps-instruments-api/)
- [0xArchive HIP-3 Builder Perps - L4 Order Book API](https://apis.io/apis/0xarchive/0xarchive-hip-3-builder-perps-l4-order-book-api/)
- [0xArchive HIP-3 Builder Perps - Liquidations API](https://apis.io/apis/0xarchive/0xarchive-hip-3-builder-perps-liquidations-api/)
- [0xArchive HIP-3 Builder Perps - Open Interest API](https://apis.io/apis/0xarchive/0xarchive-hip-3-builder-perps-open-interest-api/)

## Tags

Web3 Authentication

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/0xarchive/0xarchive-web3-authentication-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/0xarchive/.