Fyrnity — small, honest developer APIs for the AI era

Five focused APIs on RapidAPI. Each solves one problem well, has a free tier, and never stores your data.

• ChromaWrite — humanize AI text, rewrite, grammar, tone shift and summarize in 50+ languages.
• MarkdownPDF — sub-100ms Markdown → PDF/DOCX with custom CSS and themes.
• Agent Safety Pack — killswitch, sleep schedules and status endpoints for AI agents.
• ResonanceEngine — 4-dimensional similarity: semantic, emotional, intent, brand voice.
• Ghost Signature — Ed25519 provenance signatures with public JWKS verification.

Every product: free tier (20 calls/month), Pro at $29 (50,000 calls) and Ultra at $99 (250,000 calls). Hard limits — no surprise overage.

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