duo-data-utilities (Python)

Pay-per-call data APIs for AI agents, one typed Python client for four services. Each call is paid in USDC on Base with x402 v2. No API key, no signup.

pip install duo-data-utilities

Python 3.10 or later. Only need one service? The same clients ship as standalone packages: x402-seo-keyword-data, x402-crypto-derivatives-data and x402-social-media-data.

Quick start

import os

from eth_account import Account
from duo_data_utilities import DuoClient

client = DuoClient(Account.from_key(os.environ["DUO_PAYER_KEY"]))  # your wallet, never a literal key
print(client.iban.validate(iban="NL91 ABNA 0417 1643 00")["valid"])  # $0.05

DuoClient shares one wallet across the four services (client.derivs, client.keywords, client.social). Method names match the TypeScript client in snake_case.

Crypto derivatives data

rates = client.derivs.funding_rates(coin="BTC")                   # $0.003
book = client.derivs.orderbook(coin="BTC", size_usd=250_000)      # $0.003
arb = client.derivs.funding_arbitrage(min_apr=20)                 # $0.005, all coins

Bybit, Hyperliquid, dYdX, Gate, Kraken, Bitfinex, Deribit and OKX. When fewer venues answer than the route needs, the answer is a 503 and nothing is charged. Data only, not investment advice.

SEO and keyword data

volume = client.keywords.search_volume(keywords=["phone", "watch"], country="us")    # $0.04 (GET)
ideas = client.keywords.keyword_ideas(keyword="seo api", limit=50)                    # $0.04 (POST, JSON body)
trend = client.keywords.trend(keyword="seo tools", timeframe="past_12_months")        # $0.045
gap = client.keywords.keyword_gap(domain="example.com", competitor="example.org")     # $0.048

Each route has its own HTTP method (most are POST with a JSON body); the client picks it. Parameters keep their API names (locationCode, includeMonthly). SEO_KEYWORD_ROUTES lists all 44 routes with HTTP method, price and MCP tool. A bad input is a free 400; an upstream failure is a 503 with "nothing was charged".

Social media data

posts = client.social.bluesky_search(q="x402", limit=10)    # $0.01
tweets = client.social.x_search(q="x402 payments")          # $0.02
everywhere = client.social.social_search(q="x402")          # $0.025

Every route is a GET. SOCIAL_ROUTES lists all 26. Answers are third parties' public data: read the service's terms and privacy notice, and do not use the data to profile, target or train AI on individuals.

Price guard

Before anything is signed, each client refuses a payment requirement on another network than Base, in another asset than Base USDC, to another payee than 0xCD673f7e1daD254347AEab6be0DEFe8b9C6b3A39 (pay_to=), or above its cap. A refusal signs nothing and raises PriceGuardError. The client never retries a paid call on its own.

• Main API: max_price_usd=0.05.
• Derivs, keywords, social: each route is capped at its own listed price by default. One cap for all routes of a service: DuoClient(account, derivs_max_price_usd=0.003, keywords_max_price_usd=0.04, social_max_price_usd=0.01), or max_price_usd= on DerivsClient, KeywordsClient and SocialClient.
• session= (a requests.Session that already pays) replaces the wallet; the guard cannot check payments made inside it.

Errors raise DuoApiError with code, param, expected, status and request_id. call_with_receipt(path, params) returns the answer with the settlement receipt.

The full documentation, the route tables and the MCP servers are in the repository README: https://github.com/hiesem/duo-data-utilities

Listed on PayAPI Market (settlement-verified): Duo Data Utilities, SEO and Keyword Data API, Crypto Derivatives Data API, Social Media Data API.

The client sends a User-Agent naming the SDK and version (duo-data-utilities-py/<version> (+https://github.com/hiesem/duo-data-utilities)); the services store only a coarse client class, see https://api.duoleads.com/privacy. Pass user_agent= to change it.