crypto_prices

Real-time USD spot prices for crypto assets. Accepts major symbols (BTC, ETH, SOL, USDC, USDT, DAI, BNB, XRP, ...), any CoinGecko id as "coingecko:<id>", or any token by "<chain>:<tokenAddress>". Aggregated feed with per-coin confidence score, ~15s freshness. Paid tool: $0.001 per call via x402 (USDC on Base).

Parameters1

coins

array

required

Assets to price, e.g. ["ETH","BTC","coingecko:solana","base:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"]

Raw schema

{
  "type": "object",
  "properties": {
    "coins": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "minItems": 1,
      "maxItems": 50,
      "description": "Assets to price, e.g. [\"ETH\",\"BTC\",\"coingecko:solana\",\"base:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\"]"
    }
  },
  "required": [
    "coins"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

gas_prices

Live gas across chains (ethereum, base, arbitrum, optimism, polygon): current gas price, next-block base fee, slow/standard/fast priority-fee tiers straight from chain RPC, native token USD price, and the USD cost of a simple transfer so chains compare without unit math. Paid tool: $0.001 per call via x402 (USDC on Base).

Parameters1

chains

array

optional

Chains to query; omit for all supported chains

Raw schema

{
  "type": "object",
  "properties": {
    "chains": {
      "type": "array",
      "items": {
        "type": "string",
        "enum": [
          "ethereum",
          "base",
          "arbitrum",
          "optimism",
          "polygon"
        ]
      },
      "description": "Chains to query; omit for all supported chains"
    }
  },
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

defi_tvl

Current total value locked (USD) for DeFi protocols by DefiLlama slug (e.g. uniswap, aave, lido). Paid tool: $0.001 per call via x402 (USDC on Base).

Parameters1

protocols

array

required

DefiLlama protocol slugs, e.g. ["uniswap","aave"]

Raw schema

{
  "type": "object",
  "properties": {
    "protocols": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "minItems": 1,
      "maxItems": 25,
      "description": "DefiLlama protocol slugs, e.g. [\"uniswap\",\"aave\"]"
    }
  },
  "required": [
    "protocols"
  ],
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

polymarket_odds

Live Polymarket prediction market odds. Search any topic free-text ("fed rate cut", "world cup winner") or fetch one market by its slug. Returns normalized markets: outcomes, prices, bid/ask spread, 24h volume, liquidity, resolution date, and the polymarket.com URL. ~15s freshness. Paid tool: $0.001 per call via x402 (USDC on Base).

Parameters3

query	string	optional	Free-text search across Polymarket markets, e.g. "argentina world cup"
slug	string	optional	Exact Polymarket market slug (alternative to query)
limit	integer	optional	Max markets to return (default 10)

Raw schema

{
  "type": "object",
  "properties": {
    "query": {
      "type": "string",
      "minLength": 1,
      "maxLength": 200,
      "description": "Free-text search across Polymarket markets, e.g. \"argentina world cup\""
    },
    "slug": {
      "type": "string",
      "pattern": "^[a-z0-9][a-z0-9-]{0,200}$",
      "description": "Exact Polymarket market slug (alternative to query)"
    },
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 50,
      "description": "Max markets to return (default 10)"
    }
  },
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

polymarket_movers

Polymarket prediction markets with the biggest odds swings in the last 24 hours, filtered to liquid markets (default $10k+ daily volume), most-moved first. The fastest way to spot where consensus is shifting. Paid tool: $0.001 per call via x402 (USDC on Base).

Parameters2

limit	integer	optional	Max markets to return (default 10)
minVolume24h	number	optional	Ignore markets below this 24h USD volume (default 10000)

Raw schema

{
  "type": "object",
  "properties": {
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 50,
      "description": "Max markets to return (default 10)"
    },
    "minVolume24h": {
      "type": "number",
      "minimum": 0,
      "description": "Ignore markets below this 24h USD volume (default 10000)"
    }
  },
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

polymarket_resolving

Active Polymarket prediction markets resolving within the next N hours (default 24), sorted by 24h volume, with live prices. For tracking imminent event outcomes. Paid tool: $0.001 per call via x402 (USDC on Base).

Parameters2

hours	number	optional	Window in hours (default 24)
limit	integer	optional	Max markets to return (default 10)

Raw schema

{
  "type": "object",
  "properties": {
    "hours": {
      "type": "number",
      "exclusiveMinimum": 0,
      "maximum": 720,
      "description": "Window in hours (default 24)"
    },
    "limit": {
      "type": "integer",
      "minimum": 1,
      "maximum": 50,
      "description": "Max markets to return (default 10)"
    }
  },
  "additionalProperties": false,
  "$schema": "http://json-schema.org/draft-07/schema#"
}

service_info

Free. Service, pricing, and payment details for the chainpulse tools on this server.

Parameters

No parameters.

Raw schema

{
  "type": "object",
  "properties": {},
  "$schema": "http://json-schema.org/draft-07/schema#"
}

chainpulse — real-time crypto + prediction market data for AI agents

in.fastdb.md/chainpulse (MCP Server)

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

crypto_prices

gas_prices

defi_tvl

polymarket_odds

polymarket_movers

polymarket_resolving

service_info

Install

Remote endpoint