Web & software development

Optimize prompts and generate agent SOPs and skill packages with the Prompt Optimizer cloud API.

Source-backed prompting and coding-agent guidance with provenance and freshness checks.

Notarize, e-sign, and verify identity with the Proof API. Unofficial; not affiliated with Proof.

One API, all things verified — control, delegation, human approval, anti-impersonation.

Add a text box that proves a human typed it, not AI. Code for any framework; verify proof tokens.

Audit infrastructure for AI coding agents with evidence-backed review and policy gates.

Check by manifest SHA-256, without an account, whether the ProofSnap API issued an evidence package.

Local, read-only acceptance reports for AI-assisted Git changes, exposed as one MCP tool.

Run e2e flows on real iOS and Android phones through the local Proofsheet hub (macOS).

Property Finder real estate listing portal MCP server: publish listing, unpublish listing.

ProPublica Nonprofit MCP — ProPublica Nonprofit Explorer API (free, no auth)

Prospeo MCP — wraps the Prospeo 'Enrich Person' API (prospeo.io)

Tested, version-pinned code recipes for AI coding agents, each with its last-passed receipt.

Real-time Meta, Google, LinkedIn and TikTok ad library access for AI assistants. No API keys.

Diagnose proxy misconfigurations that break AI coding tools (Cursor, VS Code, Windsurf)

Test inboxes for your app's sign-up and login emails: get the code or link, or why none came.

Query free proxies by country, protocol and anonymity. Read-only access; no account or API key.

Read-only tools that check whether code, and the tests that claim it works, are real.

Point-in-time US equity fundamentals for quants and AI agents. Free tier, no API key needed.

pub.dev MCP — package registry for Dart & Flutter.

Public data API with ML enrichment — SEC EDGAR, FRED, NOAA, EPA, USGS. 404 endpoints.

NHL and PWHL stats, play-by-play, expected goals and odds. REST API and MCP server. Free to start.

Puerto Rico statutes — 'leyes' (acts) of the Puerto Rico Legislature, section/article lookup and…

Turn any public webpage into JSON with AI, save it as a live JSON API, and call it from your agent.

Complete backend for AI-built apps: data, auth, workflows, SLAs, HITL & RAG in 176 MCP tools.

Web Push (VAPID), Android (FCM), iOS (APNs), In-App Popup, Toast & Transactional Email OTP engine.

PushPress gym and studio management MCP server: list members, book class reservation.

Send push notifications to your devices and groups via the Pushover API.

PyPI releases: Python package versions, daily. Be born in one call — free testnet funds.

Playwright-style MCP to inspect, control, and debug PySide6 desktop GUIs.

PyPI MCP — wraps the Python Package Index (PyPI) JSON API (free, no auth).

Security + bug + perf + refactor audit for Python. Returns 0-10 score + MD report.

Proves AI-generated Python does what you asked: lint, types, security, sandbox run, exact fixes.

The canonical Python stdlib oracle for AI coding agents — always free, always MIT, token-frugal.

Sandboxed Python execution for AI agents. PEP 723 inline deps, multi-version Python, zero pollution.

Hosted Python sandbox for package runtime verification: pip install and usable-import evidence.

Python egg-info key count, body discarded

Python identifier charset, value discarded

Python string escape count, input discarded

Python unicode-escape count, input discarded

MCP server for Pyxel, a retro game engine for Python

Testing publish command

Read-only MCP server: a coding agent reads test sessions recorded in QA Wrap. Local only.

Translation QA: automated checks, AI evaluation, linguistic review, and visual in-context testing.

Independent QBCore API, resource and troubleshooting docs with cited sources.

Decode supplied image bytes locally; preserve exact QR/barcode payloads and scannability reports.

Generate QR codes from text or URLs. Returns base64 PNG. x402 micropayment.

Make QR codes for links, text or contact cards.

Free QR code images; paid web page → Markdown, page metadata and file hosting via x402 (no API key).

Static QR codes and 1-D barcodes (Code 128, EAN-13, UPC-A, EAN-8) as SVG, PNG or data URL.