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Measured sandbox verdicts: 7-axis probe, signed pinned receipt. Cached $0.25, fresh $2.50.

Read and build vCard contacts offline: parse .vcf cards or JSON and generate vCard 4.0

Prime testing, factorisation and searches offline with BigInt: Miller-Rabin and Pollard rho

Create, check and apply unified diffs offline, with no shell and no repository needed

Live npm registry data: package detail with weekly downloads, search and version history

Validate JSON against a JSON Schema offline, with a clear list of every structural error

Work with JSONC offline: strip comments and trailing commas, parse to JSON and locate errors

Live DNS lookups: A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV and PTR reverse lookups

DME billing and medical coding: code lookup, DMEPOS fee schedules, Medicare prior-auth checks

Local-first persistent memory for AI coding agents - 96.0% R@5 on LongMemEval, zero LLM calls.

Your coding agent keeps your help center current: it drafts article fixes after code changes.

Public DNS, certificate transparency, and identity observations.

PAN-OS firewall MCP server: scoped, audited, two-person change control. Rust.

Maps, geocoding and time zones for AI coding agents, on OpenStreetMap, with hard prepaid spend caps.

Find test gaps, generate grounded tests, and dynamically prove behavior with mutation testing.

Compile and run Omega (.om) programs in a sandbox, and look up Omega errors and keywords.

Drive the iOS Simulator from a coding agent, with every action verified.

AI observability, explainability and governance: drift, fairness, ISO 42001, risk register.

Check Java 17 code for C++ translation problems, fix them, and translate it to C++20.

Design system for coding agents: component specs, rules, tokens, icons and checked React snippets.

Find where one dependency is constrained differently across a repository's manifests.

Marketplace and infrastructure for MCP servers and skills: deploy, host, monetize, analytics.

Docs for Fiscalisto's Mexican e-invoicing API (CFDI 4.0): search, operations, SDK code, errors.

Search attributed motion recipes and prepare prompts for your coding agent. No API key required.