toll-sdk

Python client for Toll's coin checks, read from the chain (Robinhood Chain, Solana, BSC), over Toll's remote MCP server. Who is behind a coin, the dev's record, and whether there is a real product behind it. Standard library only, Python >= 3.9, typed.

Information only, not financial advice.

Install

pip install toll-sdk        # import name: toll_sdk

Example

from toll_sdk import Toll

toll = Toll()
check = toll.check_coin("0xff9e86e6b21fd688027981bee4b64c8b6b804ed3", chain="rh")
print(check.text)                      # markdown facts from the chain
larp = toll.larp_check("0xff9e86e6b21fd688027981bee4b64c8b6b804ed3", wait=True)
print(larp.text)                       # product found / partly found / not found / not read

Every method returns TollResult(text, paid_url, pending). pending ({"retry_after_s": n} or None) means part of the answer is still being read: ask again after that many seconds. paid_url is set when the free coins are used up (see below).

API

Toll(base_url="https://t0ll.xyz", opener=None, timeout=30.0, sign=None, pay_timeout=300.0)

• check_coin(address, chain=None) - chain is rh, sol or bsc
• larp_check(token, chain=None, wait=False) - rh or sol; wait=True asks again after the seconds the server gives while part of the answer is still being read or Toll is busy with many new LARP checks (max 3 tries, max 120 s)
• dev_record(wallet, chain=None), launch_record(address), wallet_privacy(wallet), fresh_launches(limit=None), chain_pulse()
• tools() lists the server's tools, call(name, args) calls any of them
• pay(paid_url, sign=None, timeout=None) - pays a paid URL once and returns its JSON (see below)
• is_valid_address(x), is_valid_wallet(x) - the checks run before anything is sent
• Failures (HTTP, JSON-RPC, timeouts, server-side input errors) raise TollError.

Free limit and the paid path

10 new coins a day per caller are free (coins already read stay free). Past that, the result carries paid_url, the x402 endpoint for that coin (0.05 USDG on Robinhood Chain, charged only for a whole answer).

pay(paid_url) runs the x402 flow itself and asks your sign function for one payment:

1. GET the URL without payment. Toll answers 402 with what to pay: x402 v2 in the PAYMENT-REQUIRED header, v1 in the body.
2. Call sign(requirements, url) once. It returns the payment header value.
3. GET again with it (PAYMENT-SIGNATURE for v2, X-PAYMENT for v1, following what the 402 offered). While Toll is still reading the coin it answers 402 {"pending": true} (nothing charged): pay resends exactly the same header after Retry-After (at least 1 s), up to 5 tries and 300 s. A 200 is the answer. Any other 402 after paying raises TollError "payment not accepted"; pay never signs a second payment for one call.

The whole call has its own timeout (pay_timeout, default 300 s). If it times out or the connection drops after the payment was sent, the error says the payment may have settled: do not retry that call with a new signature; resend the same header.

The sign contract

from toll_sdk import PaymentRequirements, Toll

def sign(req: PaymentRequirements, url: str) -> str:
    # req.x402_version: 2 when the 402 had a PAYMENT-REQUIRED header, else 1
    # req.payment_required: the decoded 402 object; req.accepts: scheme, network "eip155:4663",
    #   asset (USDG), amount (v2) / maxAmountRequired (v1), payTo, maxTimeoutSeconds, extra
    # Check the amount and payTo, sign an EIP-3009 USDG transfer authorization with your x402 client,
    # and return the header value for req.x402_version (the base64 payment payload).
    ...

toll = Toll(sign=sign)
r = toll.check_coin(address)
if r.paid_url:
    print(toll.pay(r.paid_url))

Your key never touches this SDK. Without a sign, pay raises before any request. The JavaScript SDK's README has a worked sign built on @priors/x402. Docs: https://t0ll.xyz/agents/plugins, https://t0ll.xyz/llms.txt, https://t0ll.xyz/agents/x402.

MIT.