2sio 1.42.1

Python client for 2s — the (most) everything API. Pay-per-call AI-agent data APIs, settled in USDC on Base or Solana via x402.

2sio (Python)

Python client for 2s.io — the (most) everything API. Pay-per-call AI-agent data APIs on Base or Solana via x402.

pip install 2sio

🎁 Try before you buy — free, no wallet

Verify any endpoint before funding a wallet. trial=True makes free calls (one per endpoint per hour, no key, no signup):

from twosio import TwoS

trial = TwoS(trial=True)
print(trial.validate.iban(iban="GB82WEST12345698765432").data["items"][0]["valid"])
# real result; once/hour/endpoint, then raises TwoSError(code="TRIAL_EXHAUSTED")

Pass private_key=... (below) to pay per call for unlimited access.

Quick start

import os
from twosio import TwoS

# private_key is an EVM key (0x...) holding USDC on Base mainnet.
client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])

r = client.patents.search(q="neural network", limit=5)
print(r.data["hits"][0]["title"])
print("paid:", r.cost_usd, "USDC, tx:", r.settlement["tx_hash"])

Settles on Base mainnet in ~2 seconds. Prices start at $0.001/call.

If you'd rather construct the signer yourself (e.g. for a custodial KMS-backed wallet), pass it directly:

from eth_account import Account
signer = Account.from_key(os.environ["EVM_PRIVATE_KEY"])
client = TwoS(signer=signer)

What's included

260+ endpoints across 85+ groups, namespaced on the client. A sample of the verticals:

• Patents & trademarks — USPTO patent search/detail/documents, trademark search.
• Legal — court opinions & dockets (CourtListener / Free Law Project), OFAC sanctions screening.
• Government & economy — Federal Register, Congress votes, FEC, BLS, US Census, World Bank, inflation/FX.
• Finance & markets — SEC EDGAR filings, stock fundamentals, crypto address validation, gas oracle.
• Science & medicine — arXiv / PubMed / Semantic Scholar papers, ICD-10 & clinical lookups, nutrition, chem/bio.
• Vehicles & aviation — NHTSA VIN decode & recalls, aircraft registry, airports, live flights.
• Geo & weather — geocoding (OpenStreetMap), NWS/NOAA forecasts, tides, earthquakes (USGS), timezone, sunrise.
• Business & registries — company lookups, nonprofits, GLEIF LEI entity match, licenses.
• Security — CVE lookup (NVD + CISA KEV + EPSS).
• Web & data utilities — URL→markdown, screenshots, hashing, DNS/TLS, barcode, format conversion.
• Agent primitives — knowledge-delta, memory, marketplace.

client.patents.search(q="neural network")
client.law.sanctions_check(name="John Smith")
client.vehicle.vin_decode(vin="1HGCM82633A004352")
client.security.cve(cve="CVE-2021-44228")
client.finance.company_facts(ticker="AAPL")
client.geocode.address(query="350 5th Ave, New York, NY")
# ... and many more

Settles in USDC on Base or Solana via x402. Full catalog: https://2s.io/api/directory. OpenAPI: https://2s.io/api/openapi.

Safety

• No default price cap — some endpoints are intentionally premium. Set max_price_usd to opt into a local ceiling; the client then refuses to sign any payment above it.
• Optional on_payment_requested hook for per-call approval.

client = TwoS(
    private_key=os.environ["EVM_PRIVATE_KEY"],
    max_price_usd=0.05,
    on_payment_requested=lambda info: info["amount_usd"] < 0.02,
)

Errors

• TwoSError — HTTP error from 2s.io.
• PaymentRefusedError — local refusal (price cap or hook).

License

MIT.