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Circle CCTP Cross-Chain Transfer Fee Lookup
x402
Circle CCTP Cross-Chain Transfer Fee Lookup is a paid API for AI agents from api.chainmarket-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).
Returns Circle CCTP (Cross-Chain Transfer Protocol) fee tiers and fast-burn allowance for USDC transfers between two specified blockchain domains
Price / call$0.002
Success—
StatusUnknown
How this service works
Circle CCTP (USDC cross-chain transfer) fast-burn allowance and the fee tiers for one source-to-destination domain pair. Narrowed: the attestation status of a specific transfer needs its burn transaction hash, which this tool does not take, so per-transfer attestation is not reported.
Output
Returns a JSON object containing the data source URL, an array of fee tiers (each with minimumFeeBps and finalityThreshold), the fast burn allowance in USDC, the source and destination domain IDs, and timestamps for when the data was checked and when the allowance was last updated.
Example use cases
Pre-bridge cost estimation for USDC
“Before I move USDC cross-chain via Circle CCTP, what are the current fee tiers from Ethereum to Base, and how much fast burn allowance is still available?”
Optimal finality tier selection
“I want to do a CCTP USDC transfer from Ethereum to Base — what finality threshold do I need to hit to pay zero basis points in fees versus the minimum fee tier?”
Monitor CCTP fast burn capacity
“Check the current Circle CCTP fast burn allowance for USDC going from Ethereum domain 0 to Base domain 6 so I can tell if there's enough headroom for a $10M transfer.”
Technical details
Endpoint
GEThttps://api.chainmarket-api.workers.dev/api/crypto/circle-cctp-transfers?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to programmatically check Circle CCTP fee tiers and fast burn allowance before executing a USDC cross-chain transfer, especially to determine which fee tier applies based on finality thresholds. Prefer this over manually querying Circle's iris-api directly when you want a pay-per-call, no-signup abstraction with multi-chain payment support.
Side effects
- Invalid or unsupported domain ID returns an error or empty response
- Network timeout if Circle's iris-api.circle.com is unreachable
- Payment failure if insufficient USDC balance for the $0.002 per-call fee
- Stale data if Circle's allowance endpoint has not updated recently
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"source": "https://iris-api.circle.com/v2/burn/USDC/fees/0/6",
"feeTiers": [
{
"minimumFeeBps": 1,
"finalityThreshold": 1000
},
{
"minimumFeeBps": 0,
"finalityThreshold": 2000
}
],
"checkedAt": "2026-10-23T09:36:06.160Z",
"sourceDomain": 0,
"destinationDomain": 6,
"allowanceUpdatedAt": "2026-10-23T09:36:05.104Z",
"fastBurnAllowanceUsdc": 52430875.401937
}
}Tags
x402
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