# Crypto Trending Coins by Search Interest & Momentum

> Crypto Trending Coins by Search Interest & Momentum is a paid API for AI agents from crypto-trending.hergertsynthora.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-14).

Returns real-time trending cryptocurrencies ranked by search interest and price momentum, including rank and price change data.

## Facts

- Endpoint: POST https://crypto-trending.hergertsynthora.com/service
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-trending-coins-by-search-interest-momentum-2c35333e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1yn9n_uGwqNbiVI7Bj6f0

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 crypto-trending-coins-by-search-interest-momentum-2c35333e -d '<json body>'
```

Example prompt: What cryptocurrencies are trending right now by search interest and momentum — show me the current rankings with price changes so I can spot which narratives are gaining traction?

## When to prefer this

Use this endpoint when you need real-time discovery of trending crypto assets based on search interest and price momentum rather than market cap or volume alone. Ideal for narrative/momentum trading agents, social signal aggregators, or any workflow that needs to surface which coins are gaining public attention right now. Prefer this over static market-cap lists when recency and trend velocity matter.

## Known failure modes

- Upstream data provider unavailable — no charge applied per policy
- Invalid or missing wallet address header may result in charge bypass failure
- Rate limit exceeded for free-tier wallet addresses after 3 calls
- Empty or malformed POST body may return 400 error
- Stale data if upstream feed is delayed — results may not reflect last-minute moves

## How this service works

Real-time trending coins by search interest and momentum, with rank and price change. Discovery signal for narrative/momentum agents. Free source. $0.005 USDC via x402 on Base. SYNTHORA.

## Output

A list of currently trending cryptocurrencies with their rank, price change percentage, search interest score, and a niche/narrative label — useful for identifying momentum-driven opportunities and emerging market narratives.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [],
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "ok": {
      "type": "boolean"
     },
     "type": "object",
     "niche": {
      "type": "string"
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "niche": "crypto-trending",
  "result": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-trending-coins-by-search-interest-momentum-2c35333e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from crypto-trending.hergertsynthora.com](https://www.zero.xyz/host/crypto-trending.hergertsynthora.com/llms.txt)