# Obol Bitcoin Transaction Role Classifier

> Obol Bitcoin Transaction Role Classifier is a paid API for AI agents from obol-x402.fly.dev, paid per call via x402, $0.1/call, status down (last checked 2026-09-15).

Classifies a Bitcoin transaction's money-movement role (consolidation, fan-out, or payment) and analyzes its position in Bitcoin's value-homophily graph using PLEXUS assortativity scoring.

## Facts

- Endpoint: GET https://obol-x402.fly.dev/v1/btc/tx/1ba9000f5eb10e8fa1a2dbf6125cc1b0d4740f8f8b114b7a91229056ac2e1b9d
- Price: $0.1/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/obol-bitcoin-transaction-role-classifier-73c0617c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u8qpbN0fJ8MGNsjBtR35f

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 obol-bitcoin-transaction-role-classifier-73c0617c
```

Example prompt: Can you classify what role this Bitcoin transaction plays — is it a consolidation, fan-out, or payment — and tell me if it looks whale-tier based on value-homophily? The txid is 1ba9000f5eb10e8fa1a2dbf6125cc1b0d4740f8f8b114b7a91229056ac2e1b9d.

## When to prefer this

Choose this endpoint when you need semantic classification of a Bitcoin transaction's structural role in the money graph — not just raw RPC data. Ideal for Bitcoin forensics agents, compliance tools, whale trackers, and exchange consolidation detectors that need PLEXUS assortativity scoring and value-homophily context rather than simple input/output address counts.

## Known failure modes

- Transaction ID not found on Bitcoin mainnet — returns 404 or error body
- Malformed txid (wrong length or non-hex) — returns 400 validation error
- Payment required / 402 if x402 micropayment header is missing or insufficient
- Transaction too recent and not yet confirmed — may return incomplete analysis
- Rate limiting or upstream node unavailability — 5xx response

## How this service works

Bitcoin transaction analysis: classify any BTC tx's money-movement ROLE (consolidation / fan-out / payment) and place it in Bitcoin's value-homophily law — what KIND of flow is this, is it whale-tier, does it move among its own kind? Unique PLEXUS money-graph analysis (base-rate-corrected role assortativity), not raw RPC. For Bitcoin forensics, flow classification, whale tracking ... Cryptographically signed (Ed25519) — every response is independently verifiable via /.well-known/obol-pubkey.

## Output

Returns the money-movement role label (consolidation / fan-out / payment), a PLEXUS base-rate-corrected role assortativity score reflecting Bitcoin's value-homophily law, a whale-tier flag, and metadata indicating whether the transaction moves value among peers of similar kind in the on-chain money graph.

## 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": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/obol-bitcoin-transaction-role-classifier-73c0617c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from obol-x402.fly.dev](https://www.zero.xyz/host/obol-x402.fly.dev/llms.txt)