x402 is a CLI protocol that lets you search for paid API endpoints in the bazaar, inspect their payment requirements, and call them with automatic USDC payments on Base.

How are payments handled?

Payments are made in USDC using atomic units (1,000,000 = $1.00). You can cap spending with --max-amount and the tool will auto-pay when calling an endpoint.

Can I filter resources by network?

Yes. Use --network on bazaar list to filter by networks like base or base-sepolia.

X402

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@0xRAG

npx machina-cli add skill @0xRAG/x402-2 --openclaw

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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:

Find a service - Search the bazaar or get details for a known endpoint
Check requirements - Inspect price, method, and input schema
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)

Source

git clone https://clawhub.ai/0xRAG/x402-2View on GitHub

Overview

x402 is a CLI-driven protocol to discover, inspect, and call paid API endpoints using the x402 payment protocol. Payments are settled in USDC on Base, enabling seamless access to services from the bazaar when there isn’t a clear tool to choose.

How This Skill Works

Use the npx awal@latest x402 commands to discover, inspect, and call paid API endpoints. The typical workflow is: find a service in the bazaar, check its price and input/output schemas, then call the endpoint with automatic USDC payment. The system auto-detects the HTTP method and handles payment in USDC atomic units.

When to Use It

You need to discover paid API services in the bazaar when no clear tool exists.
You want to inspect an endpoint's payment requirements without paying first.
You need to know the price, HTTP method, and input/output schemas before paying.
You want to call an x402 endpoint with automatic USDC payment.
You want to browse bazaar resources and search for paid services.

Quick Start

Step 1: Run npx awal@latest x402 bazaar search "<query>"
Step 2: Inspect the endpoint with awal x402 details <url> [--json]
Step 3: Pay and call with awal x402 pay <url> [-X <method>] [-d <json>] [--max-amount <n>] [--json]

Best Practices

Begin with bazaar keyword searches to identify candidate endpoints.
Always inspect price, method, and input/output schemas before paying.
Use --max-amount to cap spending in USDC atomic units.
Export or request JSON output with --json for automation.
Filter resources by network (e.g., base, base-sepolia) using --network.

Example Use Cases

Search for weather-related paid APIs in the bazaar.
Check what an endpoint costs with details before paying.
Make a GET request to an endpoint (auto-pays).
Make a POST request with a JSON body to a paid API.
Browse all bazaar resources with full details.

Frequently Asked Questions

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