YAML to JSON. Convert a YAML document (config files, Kubernetes manifests, OpenAPI specs, front matter) into JSON, parsed by the yaml library with anchors and aliases resolved (alias expansion capped against billion-laughs documents) and duplicate keys refused. Up to 100 KB. Use before feeding YAML into a JSON-only tool or schema check; for the reverse use json_to_yaml. Invalid YAML is a 400 with the parser's message, uncharged.

NFT metadata, Avalanche. NFT metadata on Avalanche: the token URI of one ERC-721 token id (tokenURI) and the JSON it points to (name, description, image, attributes), read from data: URIs, https or ipfs:// (through ipfs.io). Strings over 1,000 characters, such as on-chain SVG images, are shortened. Use to show or check what an NFT is; for its owner use avax_nft_owner. A token that does not exist is 422, uncharged; unreachable metadata is reported in metadataError.

Proxy implementation, Avalanche. Find the implementation behind a proxy contract on Avalanche: reads the EIP-1967 implementation, beacon and admin slots, EIP-1822 (UUPS), the older OpenZeppelin layout and EIP-1167 minimal-proxy bytecode, and names the kind found. Use before trusting or decoding a contract whose code can be swapped by its admin; for a fuller risk verdict use contract_risk. A malformed address is 400; an address without code is 404, both uncharged.

Avalanche gas price. Current gas price on Avalanche (eth_gasPrice): gas price, base fee and suggested priority fee in gwei, plus what a plain AVAX transfer (21,000 gas) costs right now. Takes no input. Use before sending a transaction or to decide whether to wait; for the fee a past transaction actually paid use avax_receipt.

NFT balance, Avalanche. How many NFTs of one ERC-721 collection a wallet holds on Avalanche (balanceOf), with the collection's name and symbol. Use to check a holder before a token-gated action or to see whether a wallet still holds a collection; for who holds one token id use avax_nft_owner. Both inputs are 0x addresses; a missing contract is 404, a contract that is not ERC-721 422, both uncharged.

Avalanche recent event logs. Recent contract event logs on Avalanche (eth_getLogs): the events a contract emitted over the last N blocks (1-1,000, default 50), optionally filtered by topic0 (the 0x 32-byte event signature hash). Returns up to 100 logs with block, transaction hash and topics. Use to watch transfers or contract events; for one transaction's outcome use avax_receipt.

NFT owner, Avalanche. Owner of an NFT on Avalanche: the wallet that holds one ERC-721 token id right now (ownerOf), plus the collection's name and symbol. Use to verify who holds an NFT before a trade, a mint gate or an airdrop; for how many a wallet holds use avax_nft_balance, for the token's metadata avax_nft_metadata. A missing contract is 404, a token that does not exist 422, both uncharged.

Estimate gas, Avalanche. Estimate the gas a transaction would use on Avalanche (eth_estimateGas) and what it would cost at the current gas price, in gas units, gwei and AVAX. Give to, plus value in AVAX and calldata for a contract call, and the sender when the call depends on it. Use before sending a transaction or to price a batch; for the gas price alone use avax_gas. A transaction that would revert is 422 with the reason, uncharged.

Avalanche contract check. Check whether a 0x address on Avalanche is a smart contract or a plain wallet: bytecode size, and whether it is an EIP-1167 minimal proxy and which implementation it points to. Use before sending funds or approving a spender; for a fuller risk verdict use check_counterparty. A malformed address is rejected with 400, uncharged.

XML to JSON converter. Convert an XML document to JSON: attributes become "@name" keys, text becomes "#text" (or the value itself when an element only holds text), and repeated child elements become arrays. DOCTYPEs and external entities are refused, so nothing outside the document is ever loaded. Up to 100,000 characters. Use to read XML feeds, SOAP responses and config files in an agent.

Token allowance, Berachain. ERC-20 token allowance on Berachain: how much a spender may move from an owner's wallet (allowance), raw and in token units, and whether the approval is unlimited. Use to check an approval before a swap or to audit risky open approvals; for the owner's balance use bera_token_balance. Token is a ticker (USDC, USDT, WETH…) or a 0x contract; a missing contract is 404 and a non-ERC-20 422, both uncharged.

Avalanche ERC-20 balance. ERC-20 token balance of a wallet on Avalanche (USDC, USDT, WETH or any token, via balanceOf): raw amount, decimals, symbol and the human-readable amount, live from the token contract. Use to check stablecoin or token holdings before a transfer or trade; for the native coin use avax_balance. Both inputs are 0x addresses (40 hex characters); no contract returns 404 and a non-ERC-20 contract 422, both uncharged.

Avalanche ERC-20 token info. Look up the name, symbol, decimals and total supply of an ERC-20 token contract on Avalanche, live from the contract. Use to identify an unknown token address or to format raw amounts; for a holder's balance use avax_token_balance. Input is a ticker (USDC, WETH…) or the token's 0x contract address; an address that is not an ERC-20 contract returns 422, uncharged.

Token transfers, Avalanche. List a wallet's recent transfers of one ERC-20 token (default USDC) on Avalanche, in and out, over the last N blocks (1-2,000, default 1,000): direction, counterparty, amount and transaction, newest first, up to 50. Use to confirm a payment arrived or see what was sent; for the current balance use avax_token_balance. Malformed addresses are rejected with 400, uncharged.

Storage slot read, Berachain. Read one raw storage slot of a contract on Berachain (eth_getStorageAt): the 32-byte word, as a number and, when it holds one, as an address. Slot is a decimal index or a 0x 32-byte key (mapping and proxy slots). Use to inspect contract state that has no getter, owners or implementation pointers; for proxies use bera_proxy. A malformed address or slot is rejected with 400, uncharged.

Berachain transaction receipt. Transaction receipt on Berachain (eth_getTransactionReceipt): success or reverted, gas used, effective gas price, fee paid in BERA, number of event logs and any contract created. Use to confirm a payment or call went through; for sender, value and calldata use bera_tx. Input is a 0x-prefixed 64-hex hash; a pending or unknown hash returns 404, uncharged.

Avalanche transaction. Look up an Avalanche transaction by hash: sender, recipient, value in AVAX, nonce, gas limit, the 4-byte function selector and its block. Use to see what was sent or whether it exists; for success or failure and fees paid use avax_receipt, for emitted events avax_logs. Input is a 0x-prefixed 64-hex hash; an unknown hash returns 404, uncharged.

Proxy implementation, Berachain. Find the implementation behind a proxy contract on Berachain: reads the EIP-1967 implementation, beacon and admin slots, EIP-1822 (UUPS), the older OpenZeppelin layout and EIP-1167 minimal-proxy bytecode, and names the kind found. Use before trusting or decoding a contract whose code can be swapped by its admin; for a fuller risk verdict use contract_risk. A malformed address is 400; an address without code is 404, both uncharged.

Berachain account nonce. Read the transaction count (nonce) of a 0x address on Berachain, both confirmed and including pending transactions. Use to build the next transaction or to tell whether an address has ever sent anything; for its balance use bera_balance. A malformed address is rejected with 400, uncharged.

Estimate gas, Berachain. Estimate the gas a transaction would use on Berachain (eth_estimateGas) and what it would cost at the current gas price, in gas units, gwei and BERA. Give to, plus value in BERA and calldata for a contract call, and the sender when the call depends on it. Use before sending a transaction or to price a batch; for the gas price alone use bera_gas. A transaction that would revert is 422 with the reason, uncharged.