Tempo metadata

BPM Detection API for Music Apps and Agents

Use Pulse when a product, assistant, or workflow needs tempo context before organizing, recommending, or preparing audio.

Who this is for

What Pulse returns

  • BPM estimate
  • tempo confidence
  • beat count when available
  • job status and selected-tool cost details

Example workflow

Estimate the cost for a public or shared audio URL, confirm the user has rights or lawful access, run BPM analysis, then store or present the tempo result alongside confidence and a half-time/double-time verification note.

Pricing and estimates

Estimates are free before paid analysis, and first-time users can try one short URL analysis before account setup. Pulse prices selected tools by audio duration using the same tool multipliers exposed by /tools: waveform 0.3 tokens/second, BPM 0.5 tokens/second, and key 0.5 tokens/second. The current token price is $0.005.

60 second bpm example30 tokens$0.15
3 minute full v1.0 suite234 tokens$1.17
Cached resultMay cost less$0.001 current cache-hit price

Examples are illustrative. The final estimate is shown before payment or API-key analysis and may account for selected tools, measured duration, cached analysis, failed tools, and checkout-path constraints.

Result guidance

Pulse helps discovery and utility by making analysis explicit: result, confidence, selected tools, and job status. Human listening judgment remains the final check for release, performance, or catalog commitments.

Rights-aware analysis boundary

Pulse is designed for audio the user has rights, permission, lawful access, or another legal basis to submit. Agents and apps should confirm that before analysis. Pulse does not provide transcription, stem separation, mastering, loudness correction, chord transcription, or track structure segmentation in v1.0.

Pulse is designed to make audio analysis auditable. Each analysis flow should make clear which URL was submitted, which tools were selected, what the estimate was, when rights confirmation was given, and whether the job completed, partially completed, failed, or expired.

Related Pulse resources

API docs · Agent playbook · MCP setup · Terms