clawfetch

Python SDK for ClawFetch — Web Intelligence API for AI Agents.

Pay-per-request via x402 (gasless USDC on Base). No API keys, no subscriptions.

Install

pip install clawfetch

Quick Start

Sync

from clawfetch import ClawFetch

with ClawFetch(private_key="0x...") as cf:
    # Fetch any URL as clean markdown ($0.001)
    page = cf.fetch("https://example.com")

    # Extract structured data ($0.003)
    btc = cf.extract("https://coingecko.com/en/coins/bitcoin")
    print(btc["data"])

    # Multi-source research ($0.01)
    report = cf.research("latest AI agent frameworks")

Async

import asyncio
from clawfetch import AsyncClawFetch

async def main():
    async with AsyncClawFetch(private_key="0x...") as cf:
        page = await cf.fetch("https://example.com")
        btc = await cf.extract("https://coingecko.com/en/coins/bitcoin")
        report = await cf.research("latest AI agent frameworks")

asyncio.run(main())

Both clients have identical APIs — all 7 endpoints, full x402 payment flow, retry with exponential backoff, and typed error hierarchy.

API

Method	Price	Description
fetch(url)	$0.001	URL → clean markdown
render(url)	$0.002	JS-rendered page → markdown
extract(url)	$0.003	Structured data from 17+ sites
research(topic)	$0.010	Multi-source topic research
domains_check(domains)	$0.002	Domain availability check
domains_suggest(query)	$0.002	Domain name suggestions
extractors()	$0.001	List available extractors
health()	Free	API status check

Error Handling

from clawfetch import (
    ClawFetch,
    ClawFetchError,    # Base class
    PaymentError,      # 402 — insufficient USDC
    NetworkError,      # Connection/timeout failures
    RateLimitError,    # 429 — includes retry_after_ms
    ApiError,          # Other 4xx/5xx errors
)

Configuration

from clawfetch import ClawFetch, RetryOptions

cf = ClawFetch(
    private_key="0x...",
    base_url="https://api.clawfetch.ai",  # default
    timeout=30.0,                          # seconds
    retry=RetryOptions(
        max_retries=3,
        initial_delay_ms=500,
        max_delay_ms=10000,
        backoff_multiplier=2.0,
    ),
    debug=False,
)

Requirements

• Python 3.9+
• A wallet with USDC on Base (even $1 gives you 1,000+ requests)

License

MIT

---

Original README below

Python SDK for ClawFetch — Web Intelligence API for AI Agents.

Pay-per-request via x402 (gasless USDC on Base). No API keys, no subscriptions.

Install

pip install clawfetch

Quick Start

from clawfetch import ClawFetch

cf = ClawFetch(private_key="0x...")

# Fetch any URL as clean markdown ($0.001)
page = cf.fetch("https://example.com")

# Extract structured data ($0.003)
btc = cf.extract("https://coingecko.com/en/coins/bitcoin")
print(btc["data"])  # {'name': 'Bitcoin', 'price': 98432.12, ...}

# JS-rendered pages ($0.002)
rendered = cf.render("https://app.uniswap.org")

# Multi-source research ($0.01)
report = cf.research("latest AI agent frameworks")

# Domain availability ($0.002)
domains = cf.domains_check(["coolstartup.com", "coolstartup.ai"])

# List extractors ($0.001)
extractors = cf.extractors()

Configuration

from clawfetch import ClawFetch, RetryOptions

cf = ClawFetch(
    private_key="0x...",
    base_url="https://api.clawfetch.ai",  # default
    timeout=30.0,                           # request timeout in seconds
    retry=RetryOptions(                     # or False to disable retries
        max_retries=3,
        initial_delay_ms=500,
        max_delay_ms=10_000,
        backoff_multiplier=2.0,
    ),
    debug=False,                            # enable debug logging
)

Error Handling

All errors extend ClawFetchError for easy catching:

from clawfetch import ClawFetch, ClawFetchError, PaymentError, NetworkError, RateLimitError, ApiError

cf = ClawFetch(private_key="0x...")

try:
    result = cf.fetch("https://example.com")
except PaymentError as e:
    print(f"Payment failed ({e.status_code}): {e}")
except RateLimitError as e:
    print(f"Rate limited, retry after {e.retry_after_ms}ms")
except NetworkError as e:
    print(f"Network error: {e}")
except ApiError as e:
    print(f"API error {e.status_code}: {e}")
except ClawFetchError as e:
    print(f"ClawFetch error: {e}")

Error	Status	Retried
PaymentError	402	No
RateLimitError	429	Yes (with Retry-After)
ApiError	400, 401, 404	No
ApiError	500, 502, 503, 504	Yes
NetworkError	Connection/timeout	Yes

Retry Behavior

By default, retries are enabled with exponential backoff + jitter:

Attempt	Delay
1st retry	~500ms
2nd retry	~1,000ms
3rd retry	~2,000ms

Respects Retry-After headers on 429 responses. Non-retryable errors (400, 401, 402, 404) fail immediately.

Disable retries:

cf = ClawFetch(private_key="0x...", retry=False)

How It Works

1. SDK makes a request to ClawFetch
2. Server returns 402 Payment Required with USDC amount
3. SDK auto-signs an EIP-3009 gasless USDC transfer on Base
4. Request is retried with payment header
5. You get structured data back

No gas fees. No API keys. Just USDC on Base.

Context Manager

with ClawFetch(private_key="0x...") as cf:
    data = cf.extract("https://coingecko.com/en/coins/bitcoin")
# Client is automatically closed

Requirements

• Python 3.9+
• A wallet with USDC on Base (even $1 gives you 1,000+ requests)

Development

pip install -e ".[dev]"
pytest tests/ -v

License

MIT