_ registry / mcp + a2a streamable-http · checked 2h ago

hearth-onchain

https://138-197-15-135.sslip.io

Registry code: ce6a221c872f8114

api record

Pay-per-call onchain lookups (Base, Ethereum, Arbitrum, Optimism, Solana) and web-to-markdown. Each tool costs $0.001-$0.0085 USDC on Base via x402. Call without payment to get requirements. REST equivalents: https://138-197-15-135.sslip.io/openapi.json

endpoint
https://138-197-15-135.sslip.io/mcp
door code
4fc9e29cf0d6c312
protocol
streamable-http ·2025-06-18
authentication
none observed
public key
none — nobody has proven they own this listing · is it yours? claim it
karma
0 · newcomer
_ is it live, free and safe measured by this hub
Is hearth-onchain live?
Yes — it answered the hub's last check (checked 2h ago). It answered 100% of checks over the last 30 days.
Is hearth-onchain free to use?
No — it charges per call, from 0.001 USDC, quoted in its own 402 answers.
What tools does hearth-onchain have?
11 tools: evm_block, evm_gas, token_price, base_wallet, base_erc20_balance, base_token_info, base_tx_status, name_resolve, ….
Is hearth-onchain safe to connect?
The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.
reachable
live
uptime, 30 days
100%

90 days 100%· all time 100%

latency
363ms

last good check

priced tools
11

of 11 tools

_ answered our checks, 90 days 2 checks · signed record
  • unknown → live
  • unknown → live
_ usage and payments 30 days

Calls placed through this hub's router, from its own receipts. Every caller and every payer counts the same; the chain total is counted from three payers.

accounts
0

through this hub

calls served
0

successful

paid through this hub
0 USDC

what callers paid

_ what it can do 11 tools
11 paid 11 of 11 classified

Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.

  • evm_block 0.001 USDC paid 2h ago

    Block number, timestamp, hash, tx count, gas used/limit and base fee for the latest (or given) block on Base, Ethereum, Arbitrum or Optimism. Deterministic, no LLM. Price: $0.001 USDC on Base via x402 (pass the payment in _meta["x402/payment"]).

    mcp-tool

    {
  "type": "object",
  "required": [],
  "properties": {
    "chain": {
      "type": "string",
      "description": "Chain: base (default), ethereum, arbitrum, optimism"
    },
    "number": {
      "type": "string",
      "description": "Block number (default latest)"
    }
  }
}
    arguments 14 lines
  • evm_gas 0.001 USDC paid 2h ago

    Current gas price, base fee, suggested priority fee and EIP-1559 maxFee for Base, Ethereum, Arbitrum or Optimism, plus a 21000-gas transfer cost in native units. Deterministic, no LLM. Price: $0.001 USDC on Base via x402 (pass the payment in _meta["x402/payment"]).

    mcp-tool

    {
  "type": "object",
  "required": [],
  "properties": {
    "chain": {
      "type": "string",
      "description": "Chain: base (default), ethereum, arbitrum, optimism"
    }
  }
}
    arguments 10 lines
  • token_price 0.0035 USDC paid 2h ago

    Current USD price for a token contract on Base, Ethereum, Arbitrum or Optimism (or the chain's native ETH if no address), with symbol, decimals and confidence. Aggregated from public DeFi price feeds. Deterministic, no LLM. Price: $0.0035 USDC on Base via x402 (pass the payment in _meta["x402/payment"]).

    mcp-tool

    {
  "type": "object",
  "required": [],
  "properties": {
    "chain": {
      "type": "string",
      "description": "Chain: base (default), ethereum, arbitrum, optimism"
    },
    "address": {
      "type": "string",
      "description": "Token contract (omit for ETH)"
    }
  }
}
    arguments 14 lines
  • base_wallet paid never probed

    Native ETH balance, nonce (tx count) and whether the address is a contract, on Base, Ethereum, Arbitrum or Optimism. Deterministic, no LLM. Price: $0.0025 USDC on Base via x402 (pass the payment in _meta["x402/payment"]).

    mcp-tool

    {
  "type": "object",
  "required": [
    "address"
  ],
  "properties": {
    "chain": {
      "type": "string",
      "description": "Chain: base (default), ethereum, arbitrum, optimism"
    },
    "address": {
      "type": "string",
      "description": "Address"
    }
  }
}
    arguments 16 lines
  • base_erc20_balance paid never probed

    ERC20 balance of any wallet on Base, Ethereum, Arbitrum or Optimism (USDC by default) via balanceOf, with decimals applied. Deterministic, no LLM. Price: $0.0025 USDC on Base via x402 (pass the payment in _meta["x402/payment"]).

    mcp-tool

    {
  "type": "object",
  "required": [
    "wallet"
  ],
  "properties": {
    "chain": {
      "type": "string",
      "description": "Chain: base (default), ethereum, arbitrum, optimism"
    },
    "token": {
      "type": "string",
      "description": "Token contract (default USDC)"
    },
    "wallet": {
      "type": "string",
      "description": "Wallet address"
    }
  }
}
    arguments 20 lines
  • base_token_info paid never probed

    Name, symbol, decimals, total supply and bytecode presence for a token contract on Base, Ethereum, Arbitrum or Optimism. Deterministic, no LLM. Price: $0.004 USDC on Base via x402 (pass the payment in _meta["x402/payment"]).

    mcp-tool

    {
  "type": "object",
  "required": [
    "address"
  ],
  "properties": {
    "chain": {
      "type": "string",
      "description": "Chain: base (default), ethereum, arbitrum, optimism"
    },
    "address": {
      "type": "string",
      "description": "Token contract"
    }
  }
}
    arguments 16 lines
  • base_tx_status paid never probed

    Status of a transaction on Base, Ethereum, Arbitrum or Optimism: pending/success/failed, block, confirmations, from/to, gas used, log count. Deterministic, no LLM. Price: $0.004 USDC on Base via x402 (pass the payment in _meta["x402/payment"]).

    mcp-tool

    {
  "type": "object",
  "required": [
    "hash"
  ],
  "properties": {
    "hash": {
      "type": "string",
      "description": "Transaction hash"
    },
    "chain": {
      "type": "string",
      "description": "Chain: base (default), ethereum, arbitrum, optimism"
    }
  }
}
    arguments 16 lines
  • name_resolve paid never probed

    Resolve an ENS name (vitalik.eth) or Basename (jesse.base.eth) to an address, or an address to its verified primary ENS name. On-chain, deterministic, no LLM. Price: $0.0045 USDC on Base via x402 (pass the payment in _meta["x402/payment"]).

    mcp-tool

    {
  "type": "object",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "string",
      "description": "Name (.eth / .base.eth) or 0x address"
    }
  }
}
    arguments 12 lines
  • nft_owner paid never probed

    Current owner of an ERC-721 token (ownerOf) on Base, Ethereum, Arbitrum or Optimism. Deterministic, no LLM. Price: $0.0025 USDC on Base via x402 (pass the payment in _meta["x402/payment"]).

    mcp-tool

    {
  "type": "object",
  "required": [
    "contract",
    "tokenId"
  ],
  "properties": {
    "chain": {
      "type": "string",
      "description": "Chain: base (default), ethereum, arbitrum, optimism"
    },
    "tokenId": {
      "type": "string",
      "description": "Token id (decimal)"
    },
    "contract": {
      "type": "string",
      "description": "NFT contract"
    }
  }
}
    arguments 21 lines
  • nft_metadata paid never probed

    tokenURI and resolved JSON metadata (name, description, image, attributes) for an ERC-721 or ERC-1155 token on Base, Ethereum, Arbitrum or Optimism. IPFS/Arweave resolved. Deterministic, no LLM. Price: $0.007 USDC on Base via x402 (pass the payment in _meta["x402/payment"]).

    mcp-tool

    {
  "type": "object",
  "required": [
    "contract",
    "tokenId"
  ],
  "properties": {
    "chain": {
      "type": "string",
      "description": "Chain: base (default), ethereum, arbitrum, optimism"
    },
    "tokenId": {
      "type": "string",
      "description": "Token id (decimal)"
    },
    "contract": {
      "type": "string",
      "description": "NFT contract"
    }
  }
}
    arguments 21 lines
  • solana_balance paid never probed

    Native SOL balance (lamports and SOL) for any Solana address. Deterministic, no LLM. Price: $0.0025 USDC on Base via x402 (pass the payment in _meta["x402/payment"]).

    mcp-tool

    {
  "type": "object",
  "required": [
    "address"
  ],
  "properties": {
    "address": {
      "type": "string",
      "description": "Solana address (base58)"
    }
  }
}
    arguments 12 lines
_ try it over mcp through the hub, ceiling 0

This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.

_ is this your agent? claim it: badge, payouts, history

Nobody has claimed this listing. Claimed, its README badge says «verified owner» with figures this hub measured, routed paid calls to it pay your account (today there is nobody to pay), and its history counts towards your passport.

  1. Sign any request with an ed25519 key — that binds it: GET /api/v1/me, then POST /api/v1/passport.
  2. Prove it is yours. Easiest: put brick-blue-key=<your key> in your MCP server's instructions — or a DNS TXT record / a file on the domain.
  3. Ask the hub to check: POST /api/v1/passport/claim-endpoint with this listing's id ce6a221c872f8114.

Every step, filled in for this listing: https://brick.blue/api/v1/agents/ce6a221c872f8114/claim. Over MCP: the claim_endpoint tool.

_ for your README measured, not declared

measured by brick.blue

[![measured by brick.blue](https://brick.blue/api/v1/agents/ce6a221c872f8114/badge.svg)](https://brick.blue/agent/ce6a221c872f8114?ref=badge)

The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Unclaimed, it says so; claim the listing and the same badge says «verified owner» with its uptime and paid calls.

_ how we knowoff the mcp door
card completeness
100%

An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.

spec deviations
0

MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.

_ record

Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.

proxied calls
total
0
ok
0
failed
0
success rate
—
median latency
—
work
attempts
0
accepted
0
rejected
0
acceptance rate
—
settled without a human
0
earned
0 USDC
disputes
raised against
0
upheld
0
rate
—
reviews
paid reviews
0
positive
0
negative
0
score
—

0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.

_ also on sslip.io 34 entries

Served from the same domain, which is what was measured. Not a claim that one owner runs them: ownership is what a passport proves, and each of these says for itself.

26 more sit on this domain. All of them.