On-chain answers, priced per call.

Arysphere sells AI-written token verdicts and on-chain reads to agents and apps. No account. No API key. No subscription. Your agent pays a fraction of a cent to a cent in USDC, inside the request itself, over x402 — and gets the answer as JSON.

Browse services How agents call it

Endpoints: 24
Price per call: $0.002–$0.01
Payment: USDC on Base, Polygon, Arbitrum
Credentials: None needed

How it works

Call any endpoint. Every route is a plain GET with query parameters.
Get a 402, not a login wall. An unpaid call returns HTTP 402 with the payment terms.
Pay and retry. Pay the stated USDC amount, retry with the payment signature, and the answer returns immediately.

That is the whole integration. There is no signup form, no key to leak, and no monthly bill — spend is bounded to the calls you actually make.

Featured services

Token Risk Report

$0.01 per call

An AI verdict on a Base or Ethereum token contract: a grade (BASED, MID, COOKED or RADIOACTIVE), a one-liner, a roast, and the facts read from the chain — owner, proxy slots, supply, and the deepest Uniswap V3 pool's price and depth.

See verdict endpoints →

Transaction Decoder

$0.005 per call

A Base transaction decoded into plain language: status, transfers, swaps, approvals, and USD value — deterministic decoding of the receipt, no model guessing.

See transaction endpoints →

Token Quick Check

$0.002 per call

The contract facts behind a verdict — name, symbol, decimals, supply, owner, proxy slots — read from the chain. No grade, no model, just the facts.

See verdict endpoints →

Built for agents, usable by anyone

Verdicts an agent can act on. A grade plus a stated rule over the contract's own state — not raw data the agent must interpret.
Deterministic reads. Balances, allowances, blocks, gas, logs, receipts and bundles come straight from the chain.
Machine-readable spec. The full OpenAPI document lives at api.arysphere.com/openapi.json.
Two payment rails. x402 v2, plus MPP where offered in the 402 challenge.

Questions, answered honestly

Is this financial advice?: No. A verdict describes a contract's on-chain state — its owner, proxy structure, supply and market depth. It is not a safety or legitimacy call, and not a recommendation.
Do I need an account or API key?: No. Payment happens inside the request via x402. There is nothing to sign up for and no key to store.
Which chains do you read?: Token verdicts cover Base and Ethereum. Chain reads cover Ethereum mainnet. Payment settles in USDC on Base, Polygon or Arbitrum.
What does a call cost?: Between $0.002 and $0.01, fixed per endpoint, stated in the 402 challenge before you pay. Verdicts are $0.01; most reads are $0.002–$0.003.
Who runs Arysphere?: A one-person operation. Contact: ari@arysphere.com, @ARYSPHERE.
How do I check if a token is safe before I buy?: Read the contract itself: who owns it, whether it is an upgradeable proxy, what the supply is, and how deep its trading pool is. The Token Risk Report reads exactly that and grades it; the Token Quick Check gives you the same facts without a grade.
What do BASED, MID, COOKED and RADIOACTIVE mean?: They are grades from a stated rule over the contract's own state. RADIOACTIVE means it is not a contract or not ERC-20 shaped. COOKED means a proxy implementation slot is set and a live owner is named. MID means one of those is true. BASED means neither was found. The grade describes on-chain state; it is not financial advice.
How do I read a transaction I don't understand?: Use the Transaction Decoder: it turns a Base transaction into status, transfers, swaps, approvals and USD value, decoded deterministically from the receipt.
What is x402, and why pay per call?: x402 puts payment inside the HTTP request: call an endpoint, get a 402 with the price, pay it in USDC, retry with the payment signature. Per-call pricing means no subscription, no minimum and no credentials — an agent's spend is exactly its calls. See For agents.