AI Inference

Name, symbol, decimals and total supply of any ERC20 contract in one call. Useful to label a token address before showing it to a user. Via eth_call.

Receipt of a transaction: whether it succeeded or reverted, gas used, fee actually paid, and how many logs it emitted. The call that answers did my transaction work. Via…

Current gas price and base fee for any supported chain, in wei and gwei, plus the cost estimate of a plain transfer. For agents planning a transaction. Via eth_gasPrice.

Suggested maxFeePerGas and maxPriorityFeePerGas from the last 20 blocks of real fee history, at slow, normal and fast percentiles. Beats guessing a gas price and getting…

Estimates the gas a transaction would need and prices it at the current gas price, before you sign anything. Also the cheapest way to find out that a call would revert.…

How much of a token a spender is still allowed to move on an owner's behalf, and whether that approval is unlimited. The check to run before an approve, and the one that…

Runs any read-only contract call (eth_call) with your own calldata and returns the raw result, on five chains, with no API key and no rate limit. The escape hatch for an…

Checks one URL without downloading the page: HTTP status, the full redirect chain hop by hop with the code of each, the final URL, whether it ends on HTTPS, content type…

Validates one EU VAT number offline: country prefix, the format that country uses, and the published check-digit algorithm where one exists. Says explicitly whether the…

Validates one IBAN offline: country, expected length, ISO 7064 mod-97 check digits, whether it is inside SEPA, and the account number split out. Deterministic, no networ…

One-call verdict on any ERC20 on Base, Ethereum, Polygon, Arbitrum or Optimism: a machine-readable label for who can act on your balance (no-owner-powers, owner-can-inte…

Cross-asset DECISION brief: ONE call gives an autonomous agent a trade-ready read across China and US equities, crypto and macro. Fuses macro regime + ETF allocation, cr…

Mock LLM completion (testnet). Authorizes up to $0.02; settlement charges $0.0001 per output token via Settlement-Overrides.

x402engine — OpenAI's premium reasoning model — extended thinking for complex math, science, and coding problems

x402engine — OpenAI's higher-compute Terra tier for demanding reasoning workloads

x402engine — OpenAI's balanced GPT-5.6 tier for advanced reasoning and agent workflows

x402engine — Google's latest flagship — advanced reasoning, coding, and multimodal with extended thinking

x402engine — Google's Gemini 3.1 Pro Preview on the Gemini Pro compatibility route — advanced reasoning, coding, and multimodal understanding

x402engine — OpenAI's maximum-compute GPT-5.6 tier for the hardest agent tasks

x402engine — OpenAI's reasoning model — excels at math, science, coding, and multi-step problem solving

x402engine — Anthropic's balanced model — excellent coding, reasoning, and creative writing

x402engine — Anthropic's latest Opus model — premium analysis, coding, and long-context autonomous work

x402engine — Anthropic's previous-gen Opus — strong reasoning and creative writing, large context window

x402engine — Anthropic's most powerful model — best for complex analysis, coding, and extended thinking