"Connecting Firebase to a data source or application" matching MCP connectors:

Hosted, OAuth-gated endpoint for quantakrypto's post-quantum crypto tools: scan code for quantum-vulnerable cryptography (RSA/ECDH/ECDSA/DH) and get NIST ML-KEM/ML-DSA/SLH-DSA migration guidance over authenticated HTTP — nothing to install. Sign-in required (Google/GitHub/email). Same tools as the open-source @quantakrypto/mcp server; source at github.com/quantakrypto/pqc-tools.

Check that your AI is being logical. Free tool that mathematically catches contradictions in agent reasoning. No account needed. Also offers paid guardrails that converts natural language to formal verification proofs, that anyone can check succinctly.

14 hosted MCP servers with free tiers: code review, time ops, data, business ops, education, more.

Hosted MCP server to lint SKILL.md files: packaging checks, regex tests, JSON validation, diffs.

A skeptical senior-engineer code reviewer over MCP: risk-scans unified diffs, flags AI-generated-code tells, reports complexity hotspots, scans for leaked secrets, and runs an OWASP security pass — real analyzers, no external APIs. Free tier, no signup.

A fully free linter for agent skill files: lint_skill validates YAML frontmatter, structure, size budgets, and safety phrasing with a pass/fail verdict; packaging_check validates zip layout against marketplace rules; plus regex_test, json_validate, diff_texts, and cron_explain for skill authors. No license or account required.

What CSS you can actually ship today, from live Baseline data and MDN browser-compat-data.

Honest library picks for coding agents in 25-360 tokens. Tells your agent what NOT to install.

Score the privilege a Chrome MV3 extension takes from its manifest, and diff permission sets.

Repository evidence for agents before they adopt dependencies, enter codebases, compare, or merge.

Dev-registry data: npm/PyPI/Docker/VS Code packages, dep graphs, vulns, 50+ ecosystems.

Detect malicious or vulnerable npm packages: registry search, OSV.dev and GitHub advisory lookups

Detect malicious or vulnerable npm packages: registry search, OSV.dev and GitHub advisory lookups

Rams is a design reviewer for UI code. The MCP server puts the hosted engine inside a coding agent: the agent passes files to the review_files tool and gets back a 0–100 score with file:line issues and concrete fixes — accessibility, color, typography, spacing, components, UX, motion, craft, and native SwiftUI. Same engine and scoring as the Rams GitHub App. 258 rules, published at rams.ai/rules. Free tier: 30 reviews/month.

OSS libs in your stack, really used: source, tests, callers. C#, Java, TS, Python, Rust, PHP+.

Runs your code against a contract; returns HELD or BROKE at the exact input. Deterministic.

Read-only, source-backed compatibility lookups and approved changes for ResolveMesh's catalog.

Multi-model code review: a panel of models + detectors return a pass/fail verdict. Paid via x402.

Post-quantum cryptography (PQC) vulnerability scanner. Detects ECDSA, RSA, AES-128 and other quantum-vulnerable algorithms in GitHub/GitLab/Bitbucket repos and Ethereum smart contracts. Returns risk score 0-100, CBOM (CycloneDX 1.6), and migration paths to NIST FIPS 203/204/205. Free tier: 10 scans/day, no key required.

An MCP server that gives your AI access to the source code and docs of all public github repos