# CAPI2 Momentum Foundry – Evidence Pack

> CAPI2 Momentum Foundry – Evidence Pack is a paid API for AI agents from capi2-foundry.vandurmedries.workers.dev, paid per call via x402, $0.017/call, status unknown (last checked 2026-10-11).

Analyzes source text to extract and package an evidence pack, highlighting key findings around optional priority keywords, delivered after x402 micropayment settlement.

## Facts

- Endpoint: POST https://capi2-foundry.vandurmedries.workers.dev/v1/products/evidence-pack/run?utm_source=zero.xyz
- Price: $0.017/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/capi2-momentum-foundry-evidence-pack-d736a9c8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7eReV0DsLAQdY8TjoJztf

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 capi2-momentum-foundry-evidence-pack-d736a9c8 -d '<json body>'
```

Example prompt: Analyze this contract text and build an evidence pack for me, prioritizing the keywords 'indemnity', 'liability', and 'termination' — here's the full text: [paste contract].

## When to prefer this

Choose this endpoint when you need a verifiable, receipt-backed evidence extraction from a large body of text, especially when an auditable proof-of-delivery (cryptographic hashes, payer address, signature) is required. Prefer it over generic summarization APIs when the output must be tied to a confirmed micropayment settlement and you need keyword-focused evidence packaging rather than a plain summary.

## Known failure modes

- Payment not settled via x402 — returns 402 Payment Required before processing
- Text input empty or exceeds 100,000 character limit — returns 400 validation error
- Keywords array exceeds 20 items — returns 400 validation error
- Upstream worker timeout or crash — returns 500 with no receipt
- Malformed JSON body — returns 400 parse error
- x402 payment verification failure — request rejected without processing

## How this service works

Paid agent utilities delivered after verified x402 settlement.

## Output

A JSON object containing a 'result' field with the evidence pack analysis, a 'createdAt' timestamp, a 'productId' confirming the evidence-pack product, and a 'deliveryReceipt' object that includes the payer wallet address, a unique receipt ID, delivery timestamp, SHA-256 hashes of the input and result, the settlement amount in atomic units, and a signature hash — providing a cryptographically verifiable proof of delivery.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "maxLength": 100000,
   "minLength": 1,
   "description": "Source text to examine"
  },
  "keywords": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "maxItems": 20,
   "description": "Optional terms to prioritize"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "createdAt": "2026-09-23T00:00:00.000Z",
  "productId": "evidence-pack",
  "deliveryReceipt": {
   "payer": "0x0000000000000000000000000000000000000000",
   "productId": "evidence-pack",
   "receiptId": "00000000-0000-4000-8000-000000000000",
   "deliveredAt": "2026-09-23T00:00:00.000Z",
   "inputSha256": "example-input-sha256",
   "amountAtomic": "17000",
   "resultSha256": "example-result-sha256",
   "signatureSha256": "example-signature-sha256"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/capi2-momentum-foundry-evidence-pack-d736a9c8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from capi2-foundry.vandurmedries.workers.dev](https://www.zero.xyz/host/capi2-foundry.vandurmedries.workers.dev/llms.txt)