# Agent-Side Pre-Dispute Evidence Bundling (Three-Layer Agent Stack)

> Agent-Side Pre-Dispute Evidence Bundling (Three-Layer Agent Stack) 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 2026-09-15).

Returns a paid decision-procedure brief guiding an agent to assemble a verifiable evidence bundle (x402 payment records, ERC-8004 identity attestations, A2A negotiation transcripts) before escalating a failed agreement to formal dispute.

## Facts

- Endpoint: GET https://k2so-8080.on.ascii.dev/api/services/agent-side-pre-dispute-evidence-bundling-across
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-side-pre-dispute-evidence-bundling-three-layer-agent-stack-e85f9a14
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-QghfzGeQfK1hCZJwTpaD

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-side-pre-dispute-evidence-bundling-three-layer-agent-stack-e85f9a14
```

Example prompt: My agent just had a failed agreement with a counterparty — walk me through the exact pre-dispute evidence bundling procedure so I can assemble x402 payment records, ERC-8004 identity attestations, and A2A negotiation transcripts into a verifiable bundle before escalating to formal dispute.

## When to prefer this

Choose this endpoint when an agent has experienced a failed multi-party agreement and needs a structured, verifiable pre-dispute evidence assembly procedure specific to the three-layer stack (x402 payments, ERC-8004 identity, A2A negotiation). Prefer this over generic dispute documentation when operating in agentic payment ecosystems using x402 rails, especially when counterparty identity attestations and on-chain payment records are the primary evidence types. Not suitable for human-to-human dispute processes, off-chain contract disputes without x402 involvement, or post-dispute arbitration (use cross-rail adjudication bundle export for that stage).

## Known failure modes

- Payment not provided or insufficient — 402 response requiring x402 payment to proceed
- Missing required 'input.type' or 'input.method' fields — 400 validation error
- LLM/reasoning backend unavailable — may return generationSource as deterministic fallback or 503
- Topic override malformed or too long — may be ignored or return a 400
- Stale or cached brief if generatedAt timestamp is old — verify freshness before relying on procedure

## How this service works

Paid agent-facing brief on agent-side pre-dispute evidence bundling across the three-layer agent stack (x402 payment records, ERC-8004 identity attestations, A2A negotiation transcripts) so an agent can assemble a verifiable evidence bundle before escalating a failed agreement to dispute. Blunt decision procedure, not marketing.

## Output

A paid prose brief containing a blunt, actionable decision procedure for assembling a verifiable pre-dispute evidence bundle. Includes which x402 payment records, ERC-8004 identity attestations, and A2A negotiation transcripts to collect, how to structure them, when to escalate, and what completeness checks to apply. Also returns metadata fields: service slug, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, and optional topic override confirmation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "agent-side pre-dispute evidence bundling across the three-layer agent paid response",
     "$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-side-pre-dispute-evidence-bundling-three-layer-agent-stack-e85f9a14/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)