# Chain Rank & Momentum API (x402)

> Chain Rank & Momentum API (x402) is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-31).

Returns a ranked list of blockchain networks sorted by momentum, TVL, or DEX volume, including trend signals and market share data, paid per-call via USDC on Base.

## Facts

- Endpoint: GET https://kr-x402-mvp.kgy5612.workers.dev/api/v1/chains/chain-rank?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/chain-rank-momentum-api-x402-78cdb892
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UEW3ELDhTuPFu6G7TuLYD

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 chain-rank-momentum-api-x402-78cdb892
```

Example prompt: Which blockchain has the highest momentum right now — can you rank the top chains by momentum score and tell me if Base is growing or shrinking?

## When to prefer this

Choose this endpoint when an AI agent needs real-time cross-chain ranking and momentum signals without managing API keys — ideal for trading bots, DeFi routing agents, and portfolio managers that operate autonomously and can pay $0.003 USDC per call via x402. Prefer this over manual DefiLlama API integration when you need pre-aggregated momentum scores, trend labels, and next-step navigation hints in a single low-cost call.

## Known failure modes

- Invalid sort enum value returns error or default fallback
- Unknown chain name in 'chain' filter may return empty focus object
- Payment failure via x402 results in HTTP 402 before data is served
- Data may be up to 10 minutes stale due to cache TTL
- Missing required 'input' wrapper in request body causes schema validation error

## How this service works

Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.

## Output

A JSON object containing an ordered array of blockchain networks each with rank, momentum score, TVL in USD, 24h/7d/30d DEX volumes, TVL change percentages, and trend labels (GROWING/SHRINKING). Also includes a summary with biggest-by-TVL, busiest DEX chain, and fastest-growing chain, plus DefiLlama-sourced data timestamp and suggested next API calls.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "sort": {
       "enum": [
        "momentum",
        "tvl",
        "volume"
       ],
       "type": "string",
       "description": "Ranking key (default momentum)"
      },
      "chain": {
       "type": "string",
       "examples": [
        "Base"
       ],
       "maxLength": 40,
       "description": "Optional chain to focus, e.g. Base, Solana, Hyperliquid"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "next": [
   "/crypto/defi-tvl?chain=Base",
   "/crypto/gas-compare"
  ],
  "sort": "momentum",
  "focus": {
   "rank": 1,
   "chain": "Base",
   "trend": "GROWING"
  },
  "chains": [
   {
    "rank": 1,
    "chain": "Base",
    "flags": [],
    "trend": "GROWING",
    "tvl_usd": 5780000000,
    "chain_id": 8453,
    "tvl_flow": "flat",
    "tvl_usd_rank": 3,
    "tvl_share_pct": 5.1,
    "momentum_score": 11.1,
    "dex_volume_7d_usd": 6848442299,
    "tvl_change_7d_pct": 2.1,
    "dex_volume_24h_usd": 1466645030,
    "dex_volume_30d_usd": 29794587087,
    "tvl_change_30d_pct": 4,
    "momentum_score_rank": 1,
    "dex_volume_7d_usd_rank": 4,
    "dex_change_7d_over_7d_pct": 16.9,
    "dex_change_30d_over_30d_pct": 10.17
   }
  ],
  "source": "DefiLlama DEX volume + chain TVL (10 min cache)",
  "summary": {
   "growing": [
    "Base"
   ],
   "shrinking": [],
   "biggest_by_tvl": "Ethereum",
   "busiest_dex_7d": "Solana",
   "fastest_growing": "Base"
  },
  "updated_at": "2026-10-30T07:30:00Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chain-rank-momentum-api-x402-78cdb892/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kr-x402-mvp.kgy5612.workers.dev](https://www.zero.xyz/host/kr-x402-mvp.kgy5612.workers.dev/llms.txt)