com.formatho/runtime

up checked 2026-11-11T09:37:48.614Z

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Publisher-provided description

Self-hosted MCP server: 26 deterministic dev, security, and EVM tools.

Summary by lookupd

Offers 26 deterministic utilities for encoding, JSON, hashing, EVM math, JWT decoding, and regex testing, with no external permissions.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http runtime https://mcp.formatho.com/mcp

Codex, remote (streamable-http)

codex mcp add runtime --url https://mcp.formatho.com/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "runtime": {
      "url": "https://mcp.formatho.com/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (26 tools)

Publisher-provided text

• json.format Validate and pretty-print JSON with a configurable indent level. [data · v1.0.0 · deterministic: true · permissions: none]
• json.minify Validate JSON and strip all insignificant whitespace. [data · v1.0.0 · deterministic: true · permissions: none]
• json.validate Validate JSON and report the parse error position if invalid. [data · v1.0.0 · deterministic: true · permissions: none]
• base64.encode Base64-encode text (standard alphabet). [data · v1.0.0 · deterministic: true · permissions: none]
• base64.decode Base64-decode to text. [data · v1.0.0 · deterministic: true · permissions: none]
• url.encode Percent-encode text (component encoding). [network · v1.0.0 · deterministic: true · permissions: none]
• url.decode Decode percent-encoded text. [network · v1.0.0 · deterministic: true · permissions: none]
• slug.generate Convert text to a URL-safe kebab-case slug. [dev · v1.0.0 · deterministic: true · permissions: none]
• hash.text Hash text with md5/sha1/sha256/sha384/sha512 (hex output). MD5/SHA1 are for compatibility checks only, not security. [security · v1.0.0 · deterministic: true ·
• uuid.v4 Generate random UUID v4 values. [security · v1.0.0 · deterministic: false · permissions: none]
• random.string Generate a cryptographically random alphanumeric string. [security · v1.0.0 · deterministic: false · permissions: none]
• jwt.decode Decode a JWT (JWS compact serialization) header and claims WITHOUT verifying the signature. Reports expiry status from the exp claim. [security · v1.0.0 · deter
• evm.keccak256 Keccak-256 (Ethereum flavor, NOT NIST SHA3-256) of arbitrary hex or text. [web3 · v1.0.0 · deterministic: true · permissions: none]
• evm.function_selector Compute the 4-byte function selector from a canonical signature, with reverse lookup against common signatures. [web3 · v1.0.0 · deterministic: true · permissio
• evm.create2_address Compute the deterministic CREATE2 address: keccak256(0xff ‖ factory ‖ salt ‖ initCodeHash)[12:]. [web3 · v1.0.0 · deterministic: true · permissions: none]
• evm.storage_slot Compute Solidity storage slots: simple variables, mapping values (keccak(key ‖ p)), and dynamic array elements (keccak(p) + index). [web3 · v1.0.0 · determinist
• evm.decode_calldata Extract the 4-byte selector from raw calldata, match it against common signatures, and decode static (word-based) arguments: address, uint256, int256, bytes32,
• evm.v4_hook_permissions Uniswap v4 hook permissions: compute the 14-bit permission field from hook-call names, or decode the field from a hook address (bits live in the LOW 14 bits: ad
• erc4626.math Exact EIP-4626 vault math in BigInt: convert assets to shares (round down) and shares to assets (round down), with optional virtual offsets. [defi · v1.0.0 · de
• timestamp.convert Convert Unix seconds/milliseconds to ISO 8601 (UTC) and back. [dev · v1.0.0 · deterministic: true · permissions: none]
• regex.test Test a regular expression against text: match result plus all capture groups. [dev · v1.0.0 · deterministic: true · permissions: none]
• case.convert Convert an identifier between camelCase, snake_case, kebab-case, CONSTANT_CASE, and Title Case. [dev · v1.0.0 · deterministic: true · permissions: none]
• hex.encode Encode text to hex, or decode hex (with or without 0x) to text. [data · v1.0.0 · deterministic: true · permissions: none]
• evm.checksum_address EIP-55 checksum an Ethereum address, or verify a checksummed one. [web3 · v1.0.0 · deterministic: true · permissions: none]
• evm.unit_convert Convert EVM amounts between wei, gwei, and ether with exact BigInt math. [web3 · v1.0.0 · deterministic: true · permissions: none]
• formatho.registry List every registered Formatho tool with version, category, deterministic flag, permissions, and Formatho Verified status. [meta · v1.0.0 · deterministic: true

Details

• Version: 0.3.0
• Transports: streamable-http, stdio
• Uptime (7 days): 100%
• Median latency: 305 ms
• First indexed: 2026-11-01T08:54:06.596Z
• Last seen in registry: 2026-11-01T08:54:06.606Z

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