# TubeSignal

> TubeSignal turns YouTube videos into readable, timestamped evidence and monitors new videos from channels people care about.

## YouTube Evidence for agents
- Target one public YouTube video or a prepared channel's collected 30-day corpus of up to 20 videos.
- Receive a backwards-compatible overview in answer, up to four distinct findings in answers, original excerpts in evidence, timestamped watch_url links, provenance, and coverage.
- Each answers[].evidence_indices value is a one-based index into evidence.
- Set response_language to ko or en. evidence.text always preserves the source transcript; translated_text is separate and optional.
- The service explicitly returns insufficient_evidence instead of inventing an unsupported answer.
- It reports what speakers said. external_truth_status is always not_evaluated.

## TubeSignal as a use case
- TubeSignal itself uses this foundation to collect new channel videos and find market factors, brand mentions, risks, and differing views across long, multilingual transcripts.
- Market and industry research: compare forecasts, risks, and disagreements across expert channels.
- Brand and competitor monitoring: find mentions even when a name is absent from the title.
- Multilingual briefings: keep the original while answering in the user's UI language.

## Agent interfaces
- Landing page: https://tubesignal.net/agents
- Integration guide: https://tubesignal.net/agents/docs
- Anonymous multi-video demo: https://tubesignal.net/agents/demo
- OpenAPI 3.1: https://tubesignal.net/.well-known/openapi.json
- Capability manifest: https://tubesignal.net/.well-known/tubesignal-capability.json
- Remote MCP: https://tubesignal.net/mcp (tools: list_youtube_evidence_channels, get_youtube_evidence)
- REST: POST https://tubesignal.net/api/v1/evidence/query
- Prepared channels: GET https://tubesignal.net/api/v1/evidence/channels
- Korean document: https://tubesignal.net/llms.txt

## Minimal REST request
POST https://tubesignal.net/api/v1/evidence/query
Content-Type: application/json
Idempotency-Key: unique-retry-key

{"channel_id":"UC6kZpTl39-_SqfBrF1-N2oQ","question":"Which factors were said to shape the market outlook over the past month?","response_language":"en","answer_count":3,"evidence_limit":6}

Fixed sample channels allow three successful anonymous calls every 24 hours. Requests without an answer do not consume the allowance. Other supported targets require a bearer API key.

## Human-facing links
- Home: https://tubesignal.net/
- YouTube Evidence: https://tubesignal.net/agents
- Investment YouTube monitoring: https://tubesignal.net/invest
- Sign up: https://tubesignal.net/signup
- Log in: https://tubesignal.net/login
- Support and purchase inquiries: mailto:support@tubesignal.net