Official MCP RegistryListed
Delta Signal
Audio steganography & watermarking. Encode/decode hidden messages that survive YouTube re-encoding.
First seen 28 Oct 2026. Evidence as of 28 Oct 2026.
5
Tools
From an anonymous probe
1
Source listings
Each with its own history
1
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| decode_audio | Decode every Delta Signal layer from a WAV or MP3 file at an https URL: heartbeat cipher, spectral glyph, prime count, watermark (needs the seed used to render), ggwave, modem text and SSTV pictures (returned as PNG). | Read-only |
| describe_engine | Free. Describe Delta Signal: layers, stings, defaults, limits and prices. | Read-only |
| preview_card | Free. Render the SSTV signature card image for a message (PNG) so you can see what the picture sting will carry. | Read-only |
| render_signature | Render a Delta Signal audio signature (WAV, 48 kHz) that hides your message: in the heartbeat rhythm, as text in the spectrogram, as an inaudible watermark, and optionally as an SSTV picture, a ggwave data chirp or modem tones. Returns a download link (kept 7 days) and a manifest. Survives YouTube-grade AAC/Opus. | Changes data |
| verify_signature | Verify a Delta Signal audio signature at an https WAV URL: returns which hidden layers are present (found_layers) and whether the audio matches an expected message (matches: true/false, or null if no expected_message given). Cheaper than full decode — use it when you only need to confirm presence or identity. | Read-only |
Change history
- Listed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | org.daxfoundation.signal/delta-signal | 28 Oct 2026 | 28 Oct 2026 | 1 |