# Agent Execution Attestation & Deliverable Proof Verification Brief

> Agent Execution Attestation & Deliverable Proof Verification Brief is a paid API for AI agents from k2so-8080.on.ascii.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).

Returns a paid, LLM-generated decision procedure brief explaining how to verify that an agent actually performed work after payment, bind deliverables to attestations, and assess escrow release readiness.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/agent-execution-attestation-and-deliverable-proo
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-execution-attestation-deliverable-proof-verification-brief-e8fb71fb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dd6OMG5jjOK2jp3e-C3X9

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 agent-execution-attestation-deliverable-proof-verification-brief-e8fb71fb
```

Example prompt: I just paid an agent to complete a deliverable — give me the blunt decision procedure for verifying the agent actually did the work and whether the attestation is good enough to release escrow.

## When to prefer this

Choose this endpoint when an autonomous agent or orchestrator needs a structured, opinionated decision procedure — not marketing content — for evaluating whether post-payment work attestation is valid and escrow release is appropriate. Prefer it over general documentation when you need a blunt, agent-consumable brief that covers deliverable binding, attestation verification, and escrow readiness in one call. Most relevant in x402-payment workflows where trust in agent task completion must be established programmatically.

## Known failure modes

- Payment not provided or insufficient — returns 402 with payment details instead of brief
- Invalid or unsupported HTTP method — schema enforces GET/HEAD/DELETE only
- Topic override not recognized or too vague — may return generic rather than topic-specific brief
- Service temporarily unavailable — no brief returned, ok: false in result
- LLM generation failure — generationSource may fall back to deterministic with reduced quality

## How this service works

Paid agent-facing brief on agent execution attestation and deliverable proof verification: proving an agent actually performed the work after payment, binding deliverables to attestations, escrow release readiness-0. Blunt decision procedure, not marketing.

## Output

A structured JSON response containing a prose decision-procedure brief (plain-language, agent-readable) detailing how to verify agent execution, bind deliverables to attestations, and determine escrow release readiness. Also includes the service slug, ISO-8601 generation timestamp, generation source (llm/reasoning/deterministic), and payment confirmation fields.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "agent execution attestation and deliverable proof verification: provin paid response",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "ok",
      "paid",
      "service",
      "provider",
      "result"
     ],
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "paid": {
       "type": "boolean"
      },
      "result": {
       "type": "object",
       "required": [
        "ok",
        "service"
       ],
       "properties": {
        "ok": {
         "type": "boolean",
         "description": "Handler success"
        },
        "brief": {
         "type": "string",
         "description": "Decision procedure prose for agents"
        },
        "model": {
         "type": "string"
        },
        "topic": {
         "type": "string"
        },
        "service": {
         "type": "string",
         "description": "Service slug"
        },
        "procedure": {
         "type": "string"
        },
        "generatedAt": {
         "type": "string",
         "description": "ISO-8601 timestamp"
        },
        "generationSource": {
         "enum": [
          "llm",
          "reasoning",
          "deterministic"
         ],
         "type": "string"
        }
       }
      },
      "payment": {
       "type": "object",
       "properties": {
        "code": {
         "type": "string"
        },
        "payer": {
         "type": "string"
        },
        "detail": {
         
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-execution-attestation-deliverable-proof-verification-brief-e8fb71fb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from k2so-8080.on.ascii.dev](https://www.zero.xyz/host/k2so-8080.on.ascii.dev/llms.txt)