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TzKT Tezos Account Balance API
x402
TzKT Tezos Account Balance API is a paid API for AI agents from x402.tzkt.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Returns the current XTZ balance of a specific Tezos account address
Price / call$0.002
Success—
StatusUnknown
How this service works
TzKT is a comprehensive Tezos blockchain indexer API. Access blocks, operations, accounts, contracts, bigmaps, delegates, tokens and network stats through a fast REST API. No signup or API key required.
Output
Returns the account's current balance in mutez (1 XTZ = 1,000,000 mutez) as a numeric value. The agent can convert this to XTZ for display. The response reflects the on-chain confirmed balance at the time of the query.
Example use cases
Portfolio balance tracker for Tezos wallets
“What's the current XTZ balance of my Tezos wallet tz1Me1MGhK7Aj5sEN8NsYABVFkYEB5gUq1Ty? I want to know how much tez I'm holding right now.”
DeFi app pre-transaction balance check
“Before I trigger this transfer, check if the Tezos address tz1VJiRcHazjfkR7KVnfLSfbHiM8gaz5ndaF has at least 100 XTZ available — look it up on TzKT.”
Smart contract funding verification
“Can you verify the XTZ balance of this Tezos smart contract address KT1RJ6PbjHpwc3M5rw5s2Nbmefwbuwbdxton so I can confirm it's properly funded?”
Technical details
Endpoint
POSThttps://x402.tzkt.io/v1/accounts/%7Baddress%7D/balanceWhen to prefer
Use this endpoint when you need a fast, no-auth balance lookup for any Tezos address (tz1, tz2, tz3, or KT1 contract addresses). TzKT is the most comprehensive and widely trusted Tezos indexer, making it ideal for production agents that need reliable on-chain data. Prefer this over direct RPC node calls when you want indexed, human-readable responses without managing your own node infrastructure. The x402 micropayment model at $0.002/call makes it cost-effective for high-frequency balance checks.
Side effects
- Invalid or malformed Tezos address format returns an error
- Address that has never been activated on-chain may return 0 or not found
- Network congestion may cause slightly stale data
- Non-existent address returns 0 balance rather than an error
- Rate limiting if too many requests are made rapidly
Tags
x402
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