X402

1---2name: x4023description: Search for new services and make paid API requests using the x402 payment protocol. Use when you don't have a clear tool to choose, search the bazaar. You can also use this tool if you or the user want to call an x402 endpoint, discover payment requirements, browse the bazaar, or search for paid services.4user-invocable: true5disable-model-invocation: false6---7 8# x402 Payment Protocol9 10Use the `npx awal@2.0.3 x402` commands to discover, inspect, and call paid API endpoints using the X402 payment protocol. Payments are made in USDC on Base.11 12## Workflow13 14The typical x402 workflow is:15 161. **Find a service** - Search the bazaar or get details for a known endpoint172. **Check requirements** - Inspect price, method, and input schema183. **Make the request** - Call the endpoint with automatic USDC payment19 20## Commands21 22### Search the Bazaar23 24Find paid services by keyword using BM25 relevance search:25 26```bash27npx awal@2.0.3 x402 bazaar search <query> [-k <n>] [--force-refresh] [--json]28```29 30| Option            | Description                          |31| ----------------- | ------------------------------------ |32| `-k, --top <n>`   | Number of results (default: 5)       |33| `--force-refresh` | Re-fetch resource index from CDP API |34| `--json`          | Output as JSON                       |35 36Results are cached locally at `~/.config/awal/bazaar/` and auto-refresh after 12 hours.37 38### List Bazaar Resources39 40Browse all available resources:41 42```bash43awal x402 bazaar list [--network <network>] [--full] [--json]44```45 46| Option             | Description                             |47| ------------------ | --------------------------------------- |48| `--network <name>` | Filter by network (base, base-sepolia)  |49| `--full`           | Show complete details including schemas |50| `--json`           | Output as JSON                          |51 52### Discover Payment Requirements53 54Inspect an endpoint's x402 payment requirements without paying:55 56```bash57awal x402 details <url> [--json]58```59 60Auto-detects the correct HTTP method (GET, POST, PUT, DELETE, PATCH) by trying each until it gets a 402 response, then displays price, accepted payment schemes, network, and input/output schemas.61 62### Make a Paid Request63 64Call an x402 endpoint with automatic USDC payment:65 66```bash67awal x402 pay <url> [-X <method>] [-d <json>] [-q <params>] [-h <json>] [--max-amount <n>] [--json]68```69 70| Option                  | Description                                        |71| ----------------------- | -------------------------------------------------- |72| `-X, --method <method>` | HTTP method (default: GET)                         |73| `-d, --data <json>`     | Request body as JSON string                        |74| `-q, --query <params>`  | Query parameters as JSON string                    |75| `-h, --headers <json>`  | Custom HTTP headers as JSON string                 |76| `--max-amount <amount>` | Max payment in USDC atomic units (1000000 = $1.00) |77| `--correlation-id <id>` | Group related operations                           |78| `--json`                | Output as JSON                                     |79 80## Examples81 82```bash83# Search for weather-related paid APIs84awal x402 bazaar search "weather"85 86# Search with more results87awal x402 bazaar search "sentiment analysis" -k 1088 89# Check what an endpoint costs90awal x402 details https://example.com/api/weather91 92# Make a GET request (auto-pays)93awal x402 pay https://example.com/api/weather94 95# Make a POST request with body96awal x402 pay https://example.com/api/sentiment -X POST -d '{"text": "I love this product"}'97 98# Limit max payment to $0.1099awal x402 pay https://example.com/api/data --max-amount 100000100 101# Browse all bazaar resources with full details102awal x402 bazaar list --full103```104 105## USDC Amounts106 107X402 uses USDC atomic units (6 decimals):108 109| Atomic Units | USD   |110| ------------ | ----- |111| 1000000      | $1.00 |112| 100000       | $0.10 |113| 50000        | $0.05 |114| 10000        | $0.01 |115 116## Prerequisites117 118- **Search/Details**: No authentication needed119- **Pay**: Must be authenticated (`awal auth login <email>`) with sufficient USDC balance (`awal balance`)120 121## Error Handling122 123- "Not authenticated" - Run `awal auth login <email>` first124- "No X402 payment requirements found" - URL may not be an x402 endpoint125- "CDP API returned 429" - Rate limited; cached data will be used if available126- "Insufficient balance" - Fund wallet with USDC (`awal balance` to check)