BlockReq

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Read-only BlockReq docs, network catalog, and JSON-RPC calls across EVM chains

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Optional: Bearer <BlockReq API key> uses your own endpoint instead of the public trial

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call_rpc Read-only

Call one read-only JSON-RPC method on an EVM network. Without credentials it uses the public trial endpoint (rate-limited, recent state only); when this MCP connection sends a BlockReq API key or is signed in to a BlockReq account, it uses the caller's own endpoint, metered to their account with their plan's limits and history. eth_getLogs needs numeric fromBlock/toBlock at most 1000 blocks apart, or a blockHash. Responses above 256 KB are refused. It cannot sign or send transactions.

chainstring, required

Network slug (for example ethereum, base, arbitrum-sepolia), catalog id, hostname, name, or EVM chain ID (1 or 0x1)

methodstring, required

paramsarray

Positional JSON-RPC params; a missing block parameter means latest

Tools (6)

call_rpc

read-only

Argument	Type	Description
chain*	string	Network slug (for example ethereum, base, arbitrum-sepolia), catalog id, hostname, name, or EVM chain ID (1 or 0x1)
method*	string
params	array	Positional JSON-RPC params; a missing block parameter means latest

Input schema (JSON)

{
  "type": "object",
  "required": [
    "chain",
    "method"
  ],
  "properties": {
    "chain": {
      "type": "string",
      "description": "Network slug (for example ethereum, base, arbitrum-sepolia), catalog id, hostname, name, or EVM chain ID (1 or 0x1)"
    },
    "method": {
      "enum": [
        "eth_blockNumber",
        "eth_chainId",
        "eth_getBalance",
        "eth_call",
        "eth_getLogs",
        "eth_getTransactionByHash",
        "eth_getTransactionReceipt",
        "eth_getCode",
        "eth_getStorageAt",
        "eth_getBlockByNumber"
      ],
      "type": "string"
    },
    "params": {
      "type": "array",
      "description": "Positional JSON-RPC params; a missing block parameter means latest"
    }
  },
  "additionalProperties": false
}

get_chain

Get one network's URLs and capability flags, its API reference page, and (for EVM networks) the JSON-RPC methods documented for it.

read-only

Argument	Type	Description
chain*	string	Network slug (for example ethereum, base, arbitrum-sepolia), catalog id, hostname, name, or EVM chain ID (1 or 0x1)

Input schema (JSON)

{
  "type": "object",
  "required": [
    "chain"
  ],
  "properties": {
    "chain": {
      "type": "string",
      "description": "Network slug (for example ethereum, base, arbitrum-sepolia), catalog id, hostname, name, or EVM chain ID (1 or 0x1)"
    }
  },
  "additionalProperties": false
}

get_doc_page

Read one BlockReq docs page as Markdown. Accepts a https://blockreq.com/docs/... URL (HTML or index.md) or a path such as /docs/getting-started/.

read-only

Argument	Type	Description
url*	string	Docs page URL or path

Input schema (JSON)

{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "maxLength": 300,
      "minLength": 1,
      "description": "Docs page URL or path"
    }
  },
  "additionalProperties": false
}

get_method_reference

Get the documented parameters, result, example, and endpoints of one JSON-RPC method on one EVM network, from BlockReq's OpenRPC document.

read-only

Argument	Type	Description
chain*	string	Network slug (for example ethereum, base, arbitrum-sepolia), catalog id, hostname, name, or EVM chain ID (1 or 0x1)
method*	string	JSON-RPC method, for example eth_getLogs

Input schema (JSON)

{
  "type": "object",
  "required": [
    "chain",
    "method"
  ],
  "properties": {
    "chain": {
      "type": "string",
      "description": "Network slug (for example ethereum, base, arbitrum-sepolia), catalog id, hostname, name, or EVM chain ID (1 or 0x1)"
    },
    "method": {
      "type": "string",
      "maxLength": 100,
      "minLength": 1,
      "description": "JSON-RPC method, for example eth_getLogs"
    }
  },
  "additionalProperties": false
}

list_chains

List every published BlockReq network with its host, public trial URL, private URL pattern ({API_KEY} placeholder), WSS support, and archive and proof/debug/trace flags.

read-only

Argument	Type	Description
network_type	string	Only this network type

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "network_type": {
      "enum": [
        "mainnet",
        "testnet",
        "beacon"
      ],
      "type": "string",
      "description": "Only this network type"
    }
  },
  "additionalProperties": false
}

search_docs

Search the BlockReq docs (setup, API keys, endpoints, Request Counting, plans, networks, support). Returns page titles, URLs, Markdown URLs for get_doc_page, and snippets. Chinese queries search the Chinese pages.

read-only

Argument	Type	Description
limit	integer	Most results to return (default 5)
query*	string	Words to search for
locale	string	Docs language; defaults to the query's language

Input schema (JSON)

{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 10,
      "minimum": 1,
      "description": "Most results to return (default 5)"
    },
    "query": {
      "type": "string",
      "maxLength": 200,
      "minLength": 1,
      "description": "Words to search for"
    },
    "locale": {
      "enum": [
        "en",
        "zh-cn"
      ],
      "type": "string",
      "description": "Docs language; defaults to the query's language"
    }
  },
  "additionalProperties": false
}