StudioSphere Pulse — Free Loops and Audio Intelligence MCP

Discover free, licensed loops and analyze authorized audio for BPM, musical key and waveform data. Start with free discovery and see estimated costs before paid analysis.

Pulse · Connection guide · Open Loops · Quickstart

Start without an account

Try the anonymous browser demonstration on the connection guide: search one CC0 loop, retrieve its licence and source credit, then preview or download it. No key, account, analysis job or payment is created. This is a browser demonstration, not assistant-host certification.

Connect anonymously using Streamable HTTP:

https://mcp.studiosphere.space/mcp

The product-domain MCP entry leads to the human /connect instructions; it is not the protocol endpoint.

Ask your assistant:

Use Pulse to search for five free licensed loops. Get one with get_open_loop and show its preview, download, exact license and attribution. Do not create a key, account, analysis job or payment link.

Call search_open_loops, then get_open_loop with a returned pol_id. Retain the license, license URL and attribution with the sample. Follow each sample's terms; CC-BY samples require credit. Free discovery costs no tokens. Sample tags are creator hints; BPM and musical key are estimates requiring review.

Connection examples and host limits

Claude remote connector: use Customize → Connectors → Add custom connector, enter StudioSphere Pulse and the anonymous URL above, choose No sign in, and enable the connector in the conversation. Labels and organization permissions can vary. Use the remote interface rather than local Desktop JSON configuration. See Claude's instructions.

Claude Code: the quoted URL also works with zsh query characters:

claude mcp add --transport http studiosphere-pulse 'https://mcp.studiosphere.space/mcp'
claude mcp list

This follows Claude Code HTTP setup; it is not an actual Claude Code test result.

Cline: follow Cline MCP setup, with an anonymous remote configuration:

{
  "mcpServers": {
    "studiosphere-pulse": {
      "type": "streamableHttp",
      "url": "https://mcp.studiosphere.space/mcp"
    }
  }
}

ChatGPT: where custom MCP connections are available, the public URL with No authentication is the candidate discovery setup. ChatGPT cannot present custom Pulse API keys, and Pulse does not implement OAuth. Authenticated ChatGPT use is not supported by the current authentication boundary. See OpenAI's custom MCP guide and auth requirements.

Actual Claude, ChatGPT, Cline and Smithery host onboarding has not been tested. HTTP/SDK tests are protocol evidence, not host certification or directory approval. Paid compatibility is unverified; a public tool scan does not validate it.

Ten tools

Tool	Key needed	Behavior
search_open_loops	No	Search free licensed samples.
get_open_loop	No	Exact license, attribution, preview and download.
estimate_cost	No	Free estimated cost/duration and quote ID.
start_trial	No	Creates a private temporary key; reconnect before use.
analyze_track	Yes	Submit authorized audio for BPM/key estimates and waveform.
request_payment_link	No	Creates one-off Checkout after rights confirmation; human completes payment.
get_job_status	No	Job status, results and review notes.
get_token_balance	Yes	Private account/trial balance and allowance.
list_token_packs	No	Current tiers, including Starter.
purchase_token_pack	Yes	Creates Checkout to fund an account; human completes payment.

structure and chords are coming soon and unavailable. This public repository contains documentation and metadata, not the production implementation.

Optional authorized audio trial

Create credentials only with the human's approval. First-time users can call start_trial for a private temporary key. End the anonymous connection and reconnect to initialize with that key in a trusted key-aware client. Authentication is bound at initialization; adding a key to a later request does not upgrade an existing session.

https://mcp.studiosphere.space/mcp?api_key=YOUR_PULSE_API_KEY

This private URL illustrates the current transport, not universal host support. Quote it in shell commands. Query credentials can leak through client configuration, history or logs; never put real keys in shared prompts, screenshots, issues or version control. Pulse's MCP boundary does not support OAuth or bearer authentication. The REST API's Bearer support is a different interface.

Read get_token_balance for the per-key allowance. The October 7 live default is 78 tokens, up to 300 seconds, 24-hour expiry, one completed/partial URL analysis, at most two queued attempts if the first fails. Read live /tools and the returned allowance because configuration can differ. Remaining tokens do not grant a second song; no ongoing free tier is promised.

Authorized first-party example: Copper Step CC0 MP3, 180 seconds; CC0 provenance.

1. Call estimate_cost with that URL and selected tools; review cost and duration.
2. Confirm rights, permission, lawful access or another legal basis to submit the audio.
3. Call analyze_track with the quote ID and attestation_confirmed: true.
4. Poll get_job_status; review BPM/key estimates and confidence notes.

If interrupted, retain the private key/job ID, reconnect and poll before retrying. Do not mint another key or resubmit an uncertain job. If pricing changes, request a fresh free estimate and obtain approval again before processing or payment.

Estimated costs and ongoing use

Live October 7 defaults: $0.005/token, cached analysis $0.001/token; waveform 0.06, BPM 0.10 and key 0.10 tokens/second, rounded up per tool. A three-minute full-suite example estimates 47 tokens, exact $0.235 displayed $0.24; five minutes estimates 78 tokens/$0.39. Final costs use measured duration; request a fresh estimate, not a fixed-price promise.

Current packs: Starter 1K/$5, 10K/$50, 50K/$250, 200K/$1,000 (USD). Read list_token_packs before purchase. Banked usage has no per-job minimum; one-off Checkout has a $0.50 minimum. A short track can stay below that floor; do not increase scope just to trigger a charge.

Humans fund accounts through the token shop. Agents need a trusted key-aware connection, a spending limit and an authorized rights policy. Checkout creation is not payment success. Refund requests, pending refunds and confirmed money returned are different states; consult receipts and support for attention cases.

Privacy, support and discovery

Audio is processed for analysis and not stored as user audio; temporary processing can use disk. Stripe hosts payment entry; Pulse retains operational account/job/billing records and payment identifiers. See the privacy policy for privacy and retention details. Public pages also request typography from Google Fonts.

Terms · API docs · Machine-readable journey · MCP health

Existing listings: Official Registry (space.studiosphere/pulse,1.0.2), Smithery, Glama connector. A listing is not a compatibility endorsement.

Support/security questions: support@studiosphere.space. Never send your API key.

Operated by StudioSphere Inc., Quebec, Canada. See LICENSE for this documentation repository; sample rights are defined by each sample's own license.