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TraceFast Transaction Trace Frames
x402
TraceFast Transaction Trace Frames is a paid API for AI agents from mpp.tracefast.xyz, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-12).
Returns the full call-tree trace of an Ethereum transaction as paged frames in execution order, with no 1000-frame cap
Price / call$0.1
Success—
StatusUnknown
How this service works
TraceFast live Ethereum data: the whole call tree of a transaction, frame by frame in the order it ran, paged — no 1 000-frame cap. Path hash: Transaction hash, `0x`-prefixed, 64 hex characters, any case. Query limit: 1..=100, default 50; cursor: `nextCursor` of the previous page. Docs: https://docs.tracefast.xyz/api/trace-frames.md
Output
A paginated list of call-tree trace frames for the specified Ethereum transaction, each frame capturing a discrete step in execution order (caller, callee, function, value, gas, result, etc.), plus a nextCursor token for fetching the next page. No artificial 1000-frame cap is applied.
Example use cases
Debug failed DeFi transaction
“I need to see every internal call made during transaction 0xabc123...def456 on Ethereum — give me the full execution trace frame by frame so I can figure out exactly where it reverted.”
Audit smart contract interactions
“Pull up the complete call tree for tx 0x7e8d3f...9a2c1b and walk me through all the nested contract calls in the order they executed — don't stop at 1000 frames.”
Investigate MEV sandwich attack
“Get me the full paged trace frames for Ethereum transaction 0x3f9e12...4b7a88 — I want to see every call and subcall in execution order to understand how this MEV bot operated.”
Technical details
Endpoint
GEThttps://mpp.tracefast.xyz/api/v1/chains/1/traces/:hash/frames?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need the complete, unbounded call trace of an Ethereum mainnet transaction — especially for complex DeFi or MEV transactions that exceed 1000 internal calls. It is the right choice when other trace APIs hit frame caps and you need true pagination through the full execution tree, in exact execution order, with cursor-based paging.
Side effects
- Invalid or malformed transaction hash (not 0x-prefixed or wrong length) returns 400
- Transaction not found on Ethereum mainnet returns 404
- limit parameter out of range (0 or >100) returns 400
- Expired or invalid cursor returns 400 or empty result
- Rate limiting or payment failure returns 402 or 429
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | — |
Tags
x402
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