Hearth Onchain Data

MCP server · hosted · v1.1.0 · io.sslip.138-197-15-135/hearth-onchain

Online · tested 2h agoNEW · 3h agoNew version 1h agoSeen in the registry 48m ago

x402 pay-per-call onchain data + AI: token safety, portfolio, swap quotes, ABI, tx explain. No API k

What it does

Hearth Onchain Data is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.

No capability identified yet from its description.

Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.

At a glance

Hosted (remote)YES

Local installNO

Live checkOnline · 11 tools

Version1.1.0

PriceNot in the registry

First seen27 Oct 2026

Last checked48m ago

How to connect

As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 2h ago (live check)

Hosted endpoint

https://138-197-15-135.sslip.io/mcp streamable-http

In Claude Code: claude mcp add --transport http hearth-onchain-data https://138-197-15-135.sslip.io/mcp

MCP settings (Claude Desktop, Cursor and other MCP clients)

{
  "mcpServers": {
    "hearth-onchain-data": {
      "url": "https://138-197-15-135.sslip.io/mcp"
    }
  }
}

Live check

Electra Index connected to the hosted endpoint 2h ago

ONLINE Hearth Onchain Data answered an MCP connection on 27 Oct 2026 and introduced itself as hearth-onchain 1.0.0 (MCP protocol 2025-06-18).

11 tools offered to AI assistants

base_erc20_balance · 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"]).
base_token_info · 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"]).
base_tx_status · 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
base_wallet · 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"]).
evm_gas · 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 i
evm_block · 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/paymen
token_price · 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 U
name_resolve · 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"]).
nft_owner · 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"]).
nft_metadata · 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
solana_balance · 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"]).

What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method

Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.

Facts & evidence

Each fact shows where it was seen and when.

Fact	Value	Evidence	Source	Last confirmed
Version	1.1.0	DECLARED	SRC-001 Official MCP Registry	48m ago
Hosted endpoint	https://138-197-15-135.sslip.io/mcp	DECLARED	SRC-001 Official MCP Registry	48m ago
Local install (package)	no	DECLARED	SRC-001 Official MCP Registry	48m ago
Remote access (hosted)	yes	DECLARED	SRC-001 Official MCP Registry	48m ago
Website	https://138-197-15-135.sslip.io/llms.txt	DECLARED	SRC-001 Official MCP Registry	48m ago
Registry status	active	DECLARED	SRC-001 Official MCP Registry	48m ago
MCP server	yes	DECLARED	SRC-001 Official MCP Registry	48m ago

Change history

VERSION27 Oct 2026
1.0.0 → 1.1.0
NEW27 Oct 2026
first seen in the index

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For publishers · optional

Its hosted endpoint can be monitored. Monitoring Pro connects every 30 minutes like an AI assistant, emails you within the hour when it stops answering, keeps a 90-day availability history and adds your answer rate to your badge.

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Questions about Hearth Onchain Data

How do I connect Hearth Onchain Data?

Use the hosted endpoint https://138-197-15-135.sslip.io/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.

What tools does Hearth Onchain Data offer?

When Electra Index connected on 27 Oct 2026, it listed 11 tools: base_erc20_balance, base_token_info, base_tx_status, base_wallet, evm_gas, evm_block, token_price, name_resolve and more. The full list is in "Live check" above.

Is Hearth Onchain Data online?

Yes. Its hosted endpoint answered an MCP connection from Electra Index 2h ago.