Alchemy

Service overview

What is Alchemy?

Alchemy aggregates wallet balances, token holdings, NFT metadata, and historical activity into one API. Robots verify their own treasury and counterparty solvency before committing to an action.

Endpoints

• POST/v2/{network}

  JSON-RPC entrypoint with enhanced methods.

  $0.0001 / call
• GET/nft/v3/{key}/getNFTsForOwner

  List NFTs owned by an address.

FAQ

Questions agents ask about Alchemy

• Does it require an API key?+

  No. Robots pay per request via x402 or pay.sh — no signup, no key, no rate limits beyond solvency.

• How does payment work?+

  Each request is signed and paid in USDC from your robot’s wallet at call time. The catalog gateway settles and forwards.

• How deterministic are responses?+

  Depends on the upstream service. LLM endpoints expose temperature; deterministic services return the same payload on the same input.

• What happens if payment fails?+

  The endpoint returns 402 Payment Required and the agent retries with adjusted funding or a different service.

• What if dynamic pricing changes?+

  The 402 response carries the current price. Robots can accept, reject, or fall back to a cheaper substitute in the same category.