Enables micropayments via Coinbase x402 for paid dataset queries.
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Cryo MCP show me the latest 10 Ethereum blocks"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
Cryo MCP is an MCP server that allows you to extensively query blockchain data in natural language, powered by Cryo and Reth.
We host a remote MCP server at https://cryo-mcp.fly.dev/v1/mcp that you can use to test it out. It is connected to a Reth archive node and has access to all datasets that Cryo provides:
cryo datasets
─────────────
- address_appearances
- balance_diffs
- balance_reads
- balances
- blocks
- code_diffs
- code_reads
- codes
- contracts
- erc20_balances
- erc20_metadata
- erc20_supplies
- erc20_transfers
- erc721_metadata
- erc721_transfers
- eth_calls
- four_byte_counts (alias = 4byte_counts)
- geth_calls
- geth_code_diffs
- geth_balance_diffs
- geth_storage_diffs
- geth_nonce_diffs
- geth_opcodes
- javascript_traces (alias = js_traces)
- logs (alias = events)
- native_transfers
- nonce_diffs
- nonce_reads
- nonces
- slots (alias = storages)
- storage_diffs (alias = slot_diffs)
- storage_reads (alias = slot_reads)
- traces
- trace_calls
- transactions (alias = txs)
- vm_traces (alias = opcode_traces)It is also a demonstration of how to use payflow to integrate micropayments into your MCP server. To use it, you need to have a local payflow MCP server running that can create the payments for the paid tools.
Press cmd+, in Claude Desktop to open the settings
Go to the Developer tab
Click edit config and open the claude_desktop_config.json file
Add the cryo server to the mcpServers object:
Add the payflow server to the mcpServers object, with the correct configuration:
{
"mcpServers": {
"cryo": {
"command": "npx",
"args": [
"mcp-remote",
"https://cryo-mcp.fly.dev/v1/mcp",
"--header",
"Authorization: test",
"--transport",
"http-only"
]
},
"payflow": {
"command": "npx",
"args": ["@chainbound/payflow-mcp"],
"env": {
"PRIVATE_KEY": "",
// Set your max payment amount in USDC per tool call
"MAX_PAYMENT_AMOUNT_USDC": "10",
// Enable debug logging
"DEBUG": "payflow:*"
}
}
}
}Related MCP server: PortalMCP
Only the dataset generation (query_dataset) tool is paid, using Coinbase x402 through the payflow-sdk package. It currently costs 0.05 USDC and is payable on Base.
The MCP server uses the facilitator hosted by Coinbase to settle the payments.
We limit the number of blocks per query to 10,000. If your agent needs more data, you can use the query_dataset tool multiple times with multiple payments.
sequenceDiagram
box Grey Local
participant Claude
participant Payflow MCP
end
box Purple Remote
participant Cryo MCP
participant Facilitator
end
Claude->>+Cryo MCP: get_tool_details
Cryo MCP -->>-Claude: details
Claude->>Claude: evaluate_details
alt proceed
Claude->>+Payflow MCP: generate_payment
Payflow MCP->>-Claude: payment_details
Claude->>+Cryo MCP: tool_call, payment
Cryo MCP->>+Facilitator: verify and settle
Facilitator->>-Cryo MCP: response (success)
Cryo MCP->>-Claude: tool_result
Claude->>Claude: process & present result to user
endThis server cannot be installed
Unclaimed servers have limited discoverability.
If you are the server author, to access and configure the admin panel.
Provide AI agents and automation tools with contextual access to blockchain data including balance…
Read-only on-chain intelligence for AI agents on Base: balances, tokens, gas, tx status.
Read-only on-chain intel for AI agents on Base: balances, tokens, gas, tx status. No API keys.
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