x402

name	x402
description	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.
user-invocable	true
disable-model-invocation	false

x402 Payment Protocol

Use the npx awal@latest x402 commands to discover, inspect, and call paid API endpoints using the X402 payment protocol. Payments are made in USDC on Base.

Workflow

The typical x402 workflow is:

1. Find a service - Search the bazaar or get details for a known endpoint
2. Check requirements - Inspect price, method, and input schema
3. Make the request - Call the endpoint with automatic USDC payment

Commands

Search the Bazaar

Find paid services by keyword using BM25 relevance search:

npx awal@latest x402 bazaar search <query> [-k <n>] [--force-refresh] [--json]

Option	Description
-k, --top <n>	Number of results (default: 5)
--force-refresh	Re-fetch resource index from CDP API
--json	Output as JSON

Results are cached locally at ~/.config/awal/bazaar/ and auto-refresh after 12 hours.

List Bazaar Resources

Browse all available resources:

awal x402 bazaar list [--network <network>] [--full] [--json]

Option	Description
--network <name>	Filter by network (base, base-sepolia)
--full	Show complete details including schemas
--json	Output as JSON

Discover Payment Requirements

Inspect an endpoint's x402 payment requirements without paying:

awal x402 details <url> [--json]

Auto-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.

Make a Paid Request

Call an x402 endpoint with automatic USDC payment:

awal x402 pay <url> [-X <method>] [-d <json>] [-q <params>] [-h <json>] [--max-amount <n>] [--json]

Option	Description
-X, --method <method>	HTTP method (default: GET)
-d, --data <json>	Request body as JSON string
-q, --query <params>	Query parameters as JSON string
-h, --headers <json>	Custom HTTP headers as JSON string
--max-amount <amount>	Max payment in USDC atomic units (1000000 = $1.00)
--correlation-id <id>	Group related operations
--json	Output as JSON

Examples

# Search for weather-related paid APIs
awal x402 bazaar search "weather"

# Search with more results
awal x402 bazaar search "sentiment analysis" -k 10

# Check what an endpoint costs
awal x402 details https://example.com/api/weather

# Make a GET request (auto-pays)
awal x402 pay https://example.com/api/weather

# Make a POST request with body
awal x402 pay https://example.com/api/sentiment -X POST -d '{"text": "I love this product"}'

# Limit max payment to $0.10
awal x402 pay https://example.com/api/data --max-amount 100000

# Browse all bazaar resources with full details
awal x402 bazaar list --full

USDC Amounts

X402 uses USDC atomic units (6 decimals):

Atomic Units	USD
1000000	$1.00
100000	$0.10
50000	$0.05
10000	$0.01

Prerequisites

• Search/Details: No authentication needed
• Pay: Must be authenticated (awal auth login <email>) with sufficient USDC balance (awal balance)

Error Handling

• "Not authenticated" - Run awal auth login <email> first
• "No X402 payment requirements found" - URL may not be an x402 endpoint
• "CDP API returned 429" - Rate limited; cached data will be used if available
• "Insufficient balance" - Fund wallet with USDC (awal balance to check)