MCP servers that ship as code — a repository or a package you install and run locally (usually over stdio). They have no hosted endpoint, so we cannot probe or grade them: instead each one shows its repository, install command, license, stars and when it was last updated.
Collected from GitHub repositories and npm, PyPI, Cargo, Go, Maven, NuGet and RubyGems packages tagged as MCP servers, the official MCP Registry, Docker's MCP catalog, ModelScope, Baidu MCP World, Cline and other public directories; one entry per repository. A server that also offers a hosted endpoint is listed under Remote instead. These entries are not counted in our reachability, verification or readiness statistics.
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ESP32x Crash Decoder Visual Studio Code VSIX extension with MCP support
GPL-3.0 ★ 12 -
jwt-base64-decoder-mcpgithub.com/vinkius-labs/jwt-base64-decoder-mcpupdated this year
Vinkius Edge high-performance Model Context Protocol (MCP) server for decoding JWT tokens and Base64 strings.
★ 3 -
QECTOR Decoder Workbench 1.0.7 for Linux: 19 decoders, 10 code families and an 85-tool MCP server, with versioned schemas and immutable result manifests. Portable ELF and Debian package.
NOASSERTION ★ 1 -
QECTOR Decoder Workbench 1.0.7 for Windows: 19 decoders, 10 code families and an 85-tool MCP server, with versioned schemas and immutable result manifests. Portable exe and onedir builds.
NOASSERTION ★ 1 -
MCP server for reading and decompiling Maven jar files, with online Maven Central search and comprehensive Java project analysis
pypi MIT -
MCP server for inspecting, searching, and decompiling Maven .m2 JARs for Java AI coding agents.
MIT ★ 20 -
Encode or decode Base64 for text and local files. URL-safe and data-URI options. Local CLI and MCP server.
MIT -
Open-source decoder that identifies an encoded string and unwraps every layer, with an MCP server so your coding agent decodes instead of guessing.
MIT ★ 5 -
@mukundakatta/base64-mcpgithub.com/mukundakatta/base64-mcpupdated this year
MCP server: encode/decode base64, base64url, hex, and percent-encoding.
npm MIT -
@mukundakatta/jwt-mcpgithub.com/mukundakatta/jwt-mcpupdated this year
MCP server: decode JWT to inspect header and claims (no verification).
npm MIT -
vin-mcpgithub.com/keptlive/vin-mcpupdated this year
Free VIN decoder MCP server — NHTSA, EPA, safety ratings, recalls, fuel economy, vehicle photos
npm MIT -
vin-lookup-mcpgithub.com/taimoorgit/vin-lookup-mcpupdated this year
MCP server for decoding VINs and fetching Canadian vehicle specs from NHTSA vPIC REST API.
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Official Auto.dev SDK, CLI and MCP server: VIN decode, vehicle listings, specs, OEM build data, recalls, payments and taxes
★ 3 -
MCP server for U.S. vehicle records: NHTSA recalls, service bulletins, trouble codes, VIN decode, EPA fuel economy and crash ratings. Free, no API key.
MIT ★ 1 -
Free vehicle data and shop calculators for auto repair shops: VIN decoding, a vehicle catalog, recalls, manufacturer service bulletins, OBD-II trouble codes and labour estimates
MIT ★ 2 -
Open-source USB oscilloscope software for Hantek 6022BE and other Hantek models: triggers, FFT, protocol decoders, MCP server, Python API. macOS, Windows, Linux.
Apache-2.0 -
AI-powered logic analyzer control via Model Context Protocol - connect Claude, Cursor to sigrok-cli for automated signal capture and protocol decoding
MIT ★ 15 -
Google News API Python client for Google News RSS search, top stories, async clients, URL decoding, SearchAPI modes, and MCP tools.
MIT -
QECTOR quantum error correction tools for Claude Code and Claude Desktop: an air-gapped MCP server with verified decoding, code-building and threshold tools.
NOASSERTION ★ 1 -
jwt-labgithub.com/alishah730/jwt-labupdated this year
jwt-lab – A fast, secure, beautiful JWT CLI tool and MCP server for developers & AI agents. Encode, decode, verify, inspect, audit, and generate keys for JSON Web Tokens.
npm MIT -
CLI and MCP server for slang, memes, and trend decode. Python tools for AI agents: decode terms, list hot trends, radar status.
MIT -
unicode-removergithub.com/hegner123/unicode-removerupdated this year
MCP/CLI tool that finds literal Unicode escape sequences (\uXXXX, \UXXXXXXXX, \u{...}) in a file and decodes or strips them. Bypasses JSON-decoding pipelines that mangle escape literals.
MIT -
mcp-crypto-toolsgithub.com/rog0x/mcp-crypto-toolsupdated this year
MCP server for cryptography: hash (MD5/SHA), encode/decode (Base64/URL/hex), UUID/nanoid generator, password tools, JWT decoder Install: npx @rog0x/mcp-crypto-tools
MIT -
Local-first developer CLI and stdio MCP server for Toolars: hash, Base64, JWT decode, UUID/ULID, timestamp, cron and URL encode/decode. Zero runtime dependencies, no network access, no telemetry.
npm MIT -
Free MCP server for security operations: CVSS 3.1 scoring, IOC extraction and defanging, email header triage, hash and JWT decoding, timestamps, layered decoding, CISA KEV lookup. No account, no telemetry.
MIT -
Preflight Checks (x402)no update data
Eight deterministic pre-execution verification tools for AI agents (npm/PyPI/crates slopsquatting check, exact version & hash check, EVM tx/calldata byte decode, Bitcoin raw tx/PSBT decode, Bitcoin UTXO chain context, EUR-Lex legal citation check, CVE lookup, EU AI Act obligations retrieval). Paid per call via x402 USDC on Base.
smithery -
@mate-tools/mcp-servergithub.com/matetools/mcp-serverupdated this year
Model Context Protocol (MCP) server for mate.tools — exposes 35 utility tools to Claude Desktop, Claude Code, Cursor, Windsurf and any other MCP-compatible AI agent. Includes: count-lines, base64-encode/decode, url-encode/decode, hash, password, password-
npm MIT -
mcp-devutilsgithub.com/hlteoh37/mcp-devutilsupdated this year
MCP server with 45 developer utilities (16 free + 29 pro). Free: UUID, hash, HMAC, base64, timestamps, JWT decode, random strings, URL encode/decode, JSON format, YAML/JSON convert, regex test, cron explain, color convert, HTTP status, slugify, HTML escap
npm MIT -
MCP server: encode and decode International Morse code.
MIT -
MCP server: decode and inspect JSON Web Tokens (JWTs).
MIT -
MCP server: generate and decode ULIDs (sortable, 128-bit identifiers).
MIT -
MCP server: encode and decode RFC 4648 base32 (standard and Crockford).
MIT -
encoder-ai-mcpgithub.com/csoai-org/encoder-ai-mcpupdated this year
Encoder Ai tools for AI agents. Capabilities: encode base64, decode base64, encode url. Built by MEOK AI Labs.
npm MIT -
MCP server: encode/decode text in base64, base64url, hex, and percent-encoding.
MIT -
MCP server: encode and decode HTML entities, URL-encoding, and Unicode escapes.
MIT -
jwt-ai-mcpgithub.com/csoai-org/jwt-ai-mcpupdated this year
Jwt Ai MCP server. Tools: decode jwt, validate jwt, generate jwt. Built by MEOK AI Labs.
pypi MIT License -
searXNG-mcpgithub.com/smitkunpara/searXNG-mcpupdated this year
Multi-query web search via SearXNG + dynamic page scraping with browser support + TOON encoding/decoding for LLM optimization
MIT -
@mukundakatta/uuid-mcpgithub.com/mukundakatta/uuid-mcpupdated this year
MCP server: generate, validate, and decode UUID v4 and v7.
npm MIT -
cyberbenchgithub.com/cognis-digital/cyberbenchupdated this year
Chainable encode/decode/transform pipeline (base64/hex/rot/xor/url/gzip)
NOASSERTION -
jwtinspectgithub.com/cognis-digital/jwtinspectupdated this year
Decode JWTs and lint for alg=none, weak secrets, and missing claims
NOASSERTION -
qr-code-ai-mcpgithub.com/csoai-org/qr-code-ai-mcpupdated this year
Qr Code Ai tools for AI agents. Capabilities: generate qr data, decode qr data, create vcard qr. Built by MEOK AI Labs.
pypi MIT License -
mcp-server-devutilsgithub.com/ofershap/mcp-server-devutilsupdated this year
Zero-auth MCP server with everyday developer utilities: base64, UUID, hash, JWT decode, cron, timestamps, JSON, regex
MIT ★ 4 -
Beta x402 text inspection with bounded decoding, canary tripwires and signed inspection receipts. Explicit evaluation limits; 0.003 Base USDC.
MIT -
Read-only EUDAMED MCP server: device discovery, economic operators, reference decoding and traceable evidence investigations.
npm MIT -
Read-only Sui analytics: fund tracing, protocol-aware tx decoding, no API keys or wallet.
npm MIT -
smartsdr-mcpgithub.com/patrickrb/smartsdr-mcpupdated this year
MCP server for FlexRadio SmartSDR - CW decode and radio control via Model Context Protocol
★ 3 -
dev-utils-mcpgithub.com/yifanyifan897645/dev-utils-mcpupdated this year
MCP server with 6 essential developer utilities — UUID, Base64, hashing, JWT decode, JSON diff, regex test. Zero config, zero API keys.
MIT -
EVM calldata decoding, debug trace revert pinpointing, storage slot layout mapping, and reentrancy auditing.
MIT -
storagelensgithub.com/cognis-digital/storagelensupdated this year
Diffs and decodes contract storage layouts across proxy upgrades to catch storage-collision and uninitialized-slot bugs.
NOASSERTION -
MCP server, A2A agent card and ARC-4 registry decoders for Ripar. 15 tools that read Algorand box storage and compose registry calls — usable from any MCP client.
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Extract every UUID, ULID, NanoID, ObjectId and Snowflake, and decode the time inside.
npm MIT -
mcp-server-devutilsgithub.com/ofershap/mcp-server-devutilsupdated this year
Zero-auth MCP server with everyday developer utilities: base64, UUID, hash, JWT decode, cron, timestamps, JSON, regex
npm MIT -
A read-only Kubernetes MCP server: list resources, get resource details, retrieve pod logs, discover API resources, and perform base64 encoding/decoding operations - all while maintaining security through read-only access.
MIT ★ 25 -
MCP server that decodes, validates and explains devicetrees (.dtb/.dts) - memory maps through ranges, interrupt routing, phandles - for embedded Linux, Zephyr and hobby OS work.
MIT -
Sniff and decode BLE GATT traffic, fingerprint device profiles, and assert on insecure pairing/characteristics in CI against a capture.
NOASSERTION ★ 1 -
vaultbase-mcpgithub.com/AlexeySamosadov/vaultbase-mcpupdated this year
MCP server giving AI agents local encoding tools — base64/hex/url & URL parsing (free), plus JWT-decode & file↔base64 (Pro). Runs locally.
NOASSERTION -
Remote MCP server for AI agents: real-money crypto casino audits, trust scores, rankings and T&C-decoded bonuses from WagerX.io. Endpoint: https://wagerx.io/mcp
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dev-utils-mcpgithub.com/yifanyifan897645/dev-utils-mcpupdated this year
MCP server with 12 essential developer utilities — UUID, Base64, hashing, JWT decode, JSON diff, regex test. Zero config.
npm MIT -
sigsleuthgithub.com/cognis-digital/sigsleuthupdated this year
Decodes raw calldata and EIP-712 typed-data into human-readable intent, flagging blind-signing and malicious permit/Permit2 payloads.
NOASSERTION -
MCP server for UEFI work: boot an .efi under OVMF and explain the outcome, decode EFI_STATUS and GUIDs, check PE images, parse OVMF logs and firmware volumes.
MIT