Open-source audio transcoding proxy that renders variants on demand from signed URLs
Free, open-source testing and monitoring for MCP servers
Stage
Not given
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Founded
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Based in
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IN
Pricing model
Free
Freemium
Pricing
Open source and free to self-host
Free: browser test, CLI tool, GitHub check, and Monitor for 1 server with hourly checks and daily full tests. Pro: $19/month founding price (first 50 customers, then $29/month) for 3 servers, hourly full tests, 5-minute uptime checks, Slack alerts, and login support. Agency: $99/month (increases to
Key features
On-demand audio transcoding from signed URLs
Multiple output formats: MP3, AAC, M4A, Opus, Ogg, FLAC, WAV, and peaks
Audio trimming, fades, gain and EBU R128 loudness normalization
Speech cleanup with enhance:voice preset
Waveform peaks generation compatible with audiowaveform
Expiring URLs excluded from cache key
Render stream while encoding with real-time caching
Range-capable seeking for cached variants
Immutable cache with long-lived variant URLs
Audio-only enforcement preventing video processing
Supports servers behind login and local servers
Generates shareable HTML reports
Email and Slack alerting for server changes
What makes it different
URL-based API with no request bodies or server-side state
Options normalize to same cache key regardless of order
Streams first render to client while caching simultaneously
Range-seeking on cached variants with CDN-friendly immutable policies
Open source with Elixir implementation and reference signing algorithms
Checks are code-verified, never AI-judged, with plain evidence for each result
Completely free testing with no account required
Never modifies or deletes data; safe mode by default
No tracking, telemetry, or data sent beyond the tested server
audioproxy