# Blockchain Money Map Price-to-Proof Value Meter

> Blockchain Money Map Price-to-Proof Value Meter is a paid API for AI agents from api.blockchainmoneymap.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Compares the price and on-chain proof snippets of two blockchain API services to assess and contrast their value propositions.

## Facts

- Endpoint: POST https://api.blockchainmoneymap.com/api/x402/x402-agent-price-to-proof-value-meter?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockchain-money-map-price-to-proof-value-meter-a327e8a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__WeUfdzZORiCkOP2MRoao

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 blockchain-money-map-price-to-proof-value-meter-a327e8a0 -d '<json body>'
```

Example prompt: Compare these two blockchain data services for me in 'compare' mode: the first costs $0.05 and its proof snippets are [txHash123, blockProof456] for tracking wallet flows, and the reference service costs $0.02 with proof snippets [txHash789] but only covers token transfers — which one gives better value for monitoring DeFi activity?

## When to prefer this

Use this endpoint when an AI agent or developer needs to programmatically compare two blockchain data API services by their price and on-chain proof quality before committing to payment. It is especially useful in agent procurement workflows where cost-efficiency and proof verifiability of blockchain data matter, and when a reference baseline service exists for comparison. Prefer this over manual review when building automated API selection pipelines for blockchain analytics tasks.

## Known failure modes

- Missing required 'price' or 'proofSnippets' in facts or reference_facts — returns validation error
- Mode not set to 'compare' — endpoint may reject or return unexpected behavior
- Empty or malformed proofSnippets array — may produce low-confidence or null comparison
- Exceeding maxItems (10) on proofSnippets — request rejected
- Price field exceeding maxLength 500 — request rejected
- Network or payment failure via x402 protocol — 402 response requiring payment retry

## How this service works

Buyer agents can see a price but not whether the public proof is proportional to the value being promised.

## Output

A JSON object containing a comparative value assessment of two blockchain API services, scoring or describing how well each service's price aligns with its on-chain proof quality, with reference to buyer task, limitations, and sample outputs provided.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "mode": {
   "enum": [
    "compare"
   ]
  },
  "facts": {
   "type": "object",
   "required": [
    "price",
    "proofSnippets"
   ],
   "properties": {
    "price": {
     "type": [
      "string",
      "number"
     ],
     "maxLength": 500
    },
    "buyerTask": {
     "type": "string",
     "maxLength": 500
    },
    "limitations": {
     "type": "string",
     "maxLength": 500
    },
    "sampleOutput": {
     "type": "object",
     "maxProperties": 50,
     "additionalProperties": true
    },
    "proofSnippets": {
     "type": "array",
     "maxItems": 10
    }
   },
   "additionalProperties": false
  },
  "policy": {
   "type": "object",
   "additionalProperties": true
  },
  "reference_facts": {
   "type": "object",
   "required": [
    "price",
    "proofSnippets"
   ],
   "properties": {
    "price": {
     "type": [
      "string",
      "number"
     ],
     "maxLength": 500
    },
    "buyerTask": {
     "type": "string",
     "maxLength": 500
    },
    "limitations": {
     "type": "string",
     "maxLength": 500
    },
    "sampleOutput": {
     "type": "object",
     "maxProperties": 50,
     "additionalProperties": true
    },
    "proofSnippets": {
     "type": "array",
     "maxItems": 10
    }
   },
   "additionalProperties": false
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchain-money-map-price-to-proof-value-meter-a327e8a0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockchainmoneymap.com](https://www.zero.xyz/host/api.blockchainmoneymap.com/llms.txt)