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Bounty Engineer Delta Witness
x402
Bounty Engineer Delta Witness is a paid API for AI agents from bounty-engineer-x402-prod.onrender.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-12).
Compares two snapshots of a JSON resource and returns a structured diff (added, removed, replaced paths) along with SHA-256 hashes and change metadata.
Price / call$0.003
Success—
StatusUnknown
How this service works
Machine-buyable infrastructure for autonomous agents: API cost routing, margin optimization, funding-rate data, webpage extraction, result verification, spend controls, retry planning, state, tender search and GitHub bounty intelligence.
Output
Returns a JSON object with: a boolean 'changed' flag, an array of 'changes' (each with path, type, before value, after value), SHA-256 hashes of both the before and after states, the total change_count, and a 'truncated' flag indicating if results were capped by max_changes.
Example use cases
Price change detection for API data
“I have two snapshots of a pricing API response from earlier today and right now — can you diff them and show me which price fields changed and by how much, up to 20 changes?”
Status tracking for bounty records
“Check these two versions of a bounty record and tell me if the status field changed, what it changed from and to, and give me the hashes so I can verify integrity.”
Auditing configuration drift
“Here are the before and after states of our agent's configuration object — diff them and list every path that was modified, added, or removed, capping results at 50 changes.”
Technical details
Endpoint
POSThttps://bounty-engineer-x402-prod.onrender.com/v1/delta-witness?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a structured, path-level diff of two JSON snapshots with cryptographic integrity hashes, especially in agentic workflows where you want to verify state changes, audit modifications, or detect drift. Prefer this over generic diff tools when you need SHA-256 verification of both states and a machine-readable list of changed paths suitable for downstream agent logic.
Side effects
- Missing or malformed before/after inputs may return an error or empty diff
- max_changes set too low may truncate results and return truncated:true without full diff
- If both snapshots are identical, changed is false and changes array is empty
- Network timeout or server error on Render.com free tier may cause 502/503 responses
- Payment failure via x402 protocol results in 402 Payment Required with no diff returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| after | — | |
| before | — | |
| max_changes | integer |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"mode": "delta_witness",
"changed": true,
"changes": [
{
"path": "/price",
"type": "replace",
"after": 12,
"before": 10
},
{
"path": "/status",
"type": "replace",
"after": "closed",
"before": "open"
}
],
"truncated": false,
"after_sha256": "97bcf68fe8fda0941ccb119acdd65f20c536b3154d3b5ffdccd70b6e04e23891",
"change_count": 2,
"before_sha256": "c6a3e41eb38bec743730cdceaa6715ec3f8ea45d2be717b1dcab7b7fbba011e1"
}
}Tags
x402
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