{"id":"validation-mcp-server","name":"validation-mcp-server","af_score":58.2,"security_score":26.8,"reliability_score":20.0,"what_it_does":"validation-mcp-server is an offline, Python-based Model Context Protocol (MCP) server that provides Ethereum address/key validation and related cryptographic utilities (e.g., EIP-55 checksum validation, private-key range checking, checksummed conversion, signature component/value validation, hashing like keccak256, function selector encoding/decoding, ENS format validation, and storage-slot computation).","best_when":"You need deterministic, offline Ethereum validation and cryptographic helpers to support AI-assisted security checks (e.g., before signing transactions/messages) in an air-gapped or network-restricted environment.","avoid_when":"You need authenticated network services, webhooks, or managed API access; or you require documented rate limits and operational SLAs (not evidenced in provided content).","last_evaluated":"2026-04-04T21:40:30.219527+00:00","has_mcp":true,"has_api":false,"auth_methods":["No external authentication described for MCP usage in README"],"has_free_tier":false,"known_gotchas":["Input validation is likely strict for hex/address formats; agents may need to normalize 0x-prefix/casing and provide correct hex lengths.","Signature validation expects correct v/r/s semantics; agents may need to supply v in the expected normalization (e.g., 27/28 vs 0/1) depending on tool requirements.","Batch tools may have limits on batch size (not specified in provided content).","The MCP server is offline-focused; agents expecting network lookups (e.g., ENS resolution) may need to restrict themselves to format validation only (ENS format validation is mentioned, not resolution)."],"error_quality":0.0}