# SYNTHORA Crypto Pulse

> SYNTHORA Crypto Pulse is a paid API for AI agents from crypto-pulse.hergertsynthora.com, paid per call via x402, $0.32/call, status unknown (last checked 2026-09-14).

Aggregates four crypto market signals (Fear & Greed, BTC 24h change, perpetual funding rate, total market cap) into a single [-1,1] composite score with conflicting-signal detection and Ed25519 signature.

## Facts

- Endpoint: POST https://crypto-pulse.hergertsynthora.com/service
- Price: $0.32/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-crypto-pulse-0f89bd3b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dJwburlZWpcWMEu8sF1hr

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 synthora-crypto-pulse-0f89bd3b -d '<json body>'
```

Example prompt: Give me the current SYNTHORA Crypto Pulse composite score — the one that combines Fear & Greed, BTC 24h change, perp funding rates, and total market cap into a single [-1,1] reading, and flag it if the signals are conflicting.

## When to prefer this

Choose this endpoint when you need a single, verifiable, multi-signal composite crypto market sentiment score rather than querying individual data sources separately. It is particularly valuable when you want cryptographic proof of the data's authenticity (Ed25519 signature), when you need explicit detection of contradictory market signals, or when you want a normalized [-1,1] score that blends Fear & Greed, BTC price momentum, derivatives funding sentiment, and macro market cap data in one call. Prefer this over raw exchange APIs or single-signal sentiment tools when signal conflict detection matters.

## Known failure modes

- Payment authorization failure if x402 USDC payment on Base is not properly included — returns payment-required error
- External data feed unavailability causing one or more of the four signals to be missing or stale
- Signature verification failure if the Ed25519 signature cannot be validated against the provided public key
- Network timeout if upstream crypto data sources are slow to respond
- Invalid or malformed POST body returning a 400-level error

## How this service works

Composite crypto market pulse: aggregates 4 measured signals (Fear & Greed, BTC 24h change, perp funding, total market cap) into a single score in [-1,1] with explicit CONFLICTING-signal detection. Ed25519-signed. Pay 0.03 USDC via x402 on Base.

## Output

A JSON object containing: a composite score in the range [-1,1] representing overall crypto market sentiment, individual values for each of the four input signals (Fear & Greed index, BTC 24h price change, perpetual funding rate, total market cap contribution), a boolean or flag indicating conflicting-signal detection, a timestamp, and an Ed25519 cryptographic signature (JCS-lite-sortkeys canonical form) with public key for verifying response authenticity and provenance.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "niche": "chain-state-consensus",
  "result": {
   "rpcs": [
    {
     "rpc": "publicnode",
     "altura": 48979782,
     "retrasado": false,
     "latencia_ms": 210.9,
     "retraso_bloques": 0,
     "desviacion_bloques": 0
    },
    {
     "rpc": "1rpc",
     "altura": 48979651,
     "retrasado": true,
     "latencia_ms": 232.4,
     "retraso_bloques": 131,
     "retraso_seg_aprox": 262,
     "desviacion_bloques": -131
    }
   ],
   "cadena": "base",
   "chain_id": 8453,
   "firma_pop": {
    "alg": "ed25519",
    "sig": "014d5e0f...eb07",
    "canon": "jcs-lite-sortkeys",
    "pubkey": "1383ab71b92d91b8d62decf5018ee5296933e128256825d0e6e436b42e66b272",
    "firmado": {
     "ts": "2026-07-22T19:35:13Z",
     "payload_hash": "906afc37c8b0f603...",
     "altura_consenso": 48979782
    }
   },
   "medido_en": "2026-07-22T19:35:12Z",
   "veredicto": "RPC_RETRASADO",
   "explicacion": "Los hashes coinciden (misma cadena, sin fork), pero 1 RPC van por detras del consenso mas de 15 bloques: 1rpc (-131 bloques, ~262s).",
   "rpcs_caidos": [],
   "auditoria_hash": [
    {
     "altura": 48979651,
     "discrepantes": [],
     "divergencia_hash": false,
     "hash_mayoritario": "0xffe7509dbfdbb59e685d60ae2d05fc31db34513f6dc6a5feb521f6f3c8415206",
     "rpcs_que_entregaron_bloque": 6
    }
   ],
   "altura_consenso": 48979782,
   "metodo_consenso": "mediana_baja_de_alturas (robusta a 1 RPC mentiroso)",
   "rpcs_retrasados": [
    "1rpc"
   ],
   "divergencia_hash": false,
   "rpcs_consultados": 6,
   "dispersion_bloques": 131,
   "rpcs_que_respondieron": 6,
   "umbral_retraso_bloques": 15
  },
  "provenance": {
   "source": "SYNTHORA chain-state-consensus",
   "keyless": true
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-crypto-pulse-0f89bd3b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from crypto-pulse.hergertsynthora.com](https://www.zero.xyz/host/crypto-pulse.hergertsynthora.com/llms.txt)