# Bounty Engineer Agent Run Cost Audit

> Bounty Engineer Agent Run Cost Audit is a paid API for AI agents from bounty-engineer-x402-prod.onrender.com, paid per call via x402, $0.035/call, status unknown (last checked 2026-10-11).

Audits a batch of agent tool-call events to identify budget overages, duplicate charges, and expensive tools, then returns optimization recommendations.

## Facts

- Endpoint: POST https://bounty-engineer-x402-prod.onrender.com/v1/agent-run-cost-audit?utm_source=zero.xyz
- Price: $0.035/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bounty-engineer-agent-run-cost-audit-aa87fa77
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0BwQAavlKO6mlaCU-GRgx

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability bounty-engineer-agent-run-cost-audit-aa87fa77 -d '<json body>'
```

Example prompt: Can you audit the tool calls from my last agent run — I had 2 web_extract calls in run 'research-1' each costing $0.04, and my budget cap was $0.06 — flag any duplicates and tell me if I went over budget?

## When to prefer this

Use this endpoint when you need to post-process a batch of agent tool-call telemetry events to detect budget overruns, duplicate billing, and expensive tool patterns within a single agent run. Prefer it over manual log inspection when you have structured cost events with idempotency keys and want algorithmic duplicate detection plus recommendations. Not a substitute for verified settlement data — it works on caller-supplied cost figures.

## Known failure modes

- Missing required 'events' array in body returns validation error
- Empty events array (minItems:1 violated) returns schema error
- cost_usd field with negative value rejected by minimum:0 constraint
- Exceeding 250 events (maxItems) returns rejection
- Malformed run_id or tool fields may result in incomplete grouping
- Payment not included or insufficient USDC causes x402 payment required response

## 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 structured audit report including: total observed billed USD, budget overage amount, count of failed events, groups of repeated idempotency keys flagged as potential duplicates (with duplicate charge estimate), a ranked list of expensive tools, whether the caller's budget was exceeded, a SHA-256 hash of the input for integrity, and a list of actionable recommendations. Also includes a limitations disclaimer noting amounts are caller-supplied and not settlement-verified.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "events"
     ],
     "properties": {
      "events": {
       "type": "array",
       "items": {
        "type": "object",
        "required": [
         "run_id",
         "tool",
         "cost_usd"
        ],
        "properties": {
         "tool": {
          "type": "string"
         },
         "run_id": {
          "type": "string"
         },
         "status": {
          "type": "string"
         },
         "cost_usd": {
          "type": "number",
          "minimum": 0
         },
         "input_tokens": {
          "type": "integer"
         },
         "output_tokens": {
          "type": "integer"
         },
         "idempotency_key": {
          "type": "string"
         }
        }
       },
       "maxItems": 250,
       "minItems": 1
      },
      "policy": {
       "type": "object",
       "properties": {
        "max_run_usd": {
         "type": "number",
         "minimum": 0
        }
       }
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "ok",
      "mode"
     ],
     "properties": {
      "ok": {
       "type": "boolean",
       "const": true
      },
      "mode": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "mode": "agent-run-cost-audit",
  "budget_usd": 0.06,
  "event_count": 2,
  "limitations": [
   "Amounts, statuses and token counts are caller-supplied, not settlement-verified.",
   "Possible duplicate charges are not independently proven waste, refunds or savings.",
   "No invented token pricing or inferred buyer intent; no API calls are performed."
  ],
  "input_sha256": "5af9246f61ffec6e14ee186d7c4f9f4898317d6710cdd6343ce834dd520761c8",
  "failed_events": 0,
  "repeat_groups": [
   {
    "tool": "web_extract",
    "calls": 2,
    "run_id": "research-1",
    "successful": 2,
    "idempotency_key_hash": "106e9867be80f5c8",
    "potential_duplicate_charges_usd": 0.04
   }
  ],
  "expensive_tools": [
   {
    "tool": "web_extract",
    "calls": 2,
    "billed_usd": 0.08,
    "failed_calls": 0,
    "input_tokens": 0,
    "output_tokens": 0
   }
  ],
  "recommendations": [
   "Review same-run repeated idempotency keys; consider caching or idempotent deduplication.",
   "Enforce a hard per-run budget before future buyer-authorized calls."
  ],
  "charged_downstream": false,
  "over_caller_budget": true,
  "observed_billed_usd": 0.08,
  "observed_budget_overage_usd": 0.02,
  "repeat_idempotency_key_events": 1,
  "potential_duplicate_charges_usd": 0.04
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bounty-engineer-agent-run-cost-audit-aa87fa77/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bounty-engineer-x402-prod.onrender.com](https://www.zero.xyz/host/bounty-engineer-x402-prod.onrender.com/llms.txt)