One question, multiple answers
Request up to four distinct findings. Every answer points directly to supporting indexes in the evidence array.
TubeSignal YouTube Evidence · public beta
Give your agent grounded YouTube answers—without making it watch every video
Ask one public video or up to 20 videos from a channel's past month. TubeSignal returns distinct answers and links each one to original excerpts, publish dates, video URLs, and exact timestamps.
Search up to 20 videos
Prepared channels search up to 20 videos in a cached 30-day corpus. This is not a single-video summary demo.
Translation without losing the source
Answers follow response_language while evidence.text always preserves the original. translated_text stays separate.
REAL USE CASE
TubeSignal is the first use case for this capability
TubeSignal collects new videos from channels people care about and turns relevant moments across long, multilingual transcripts into reusable research. The same foundation is available to agents for questions such as, ‘What changed in the discussion over the past month?’
Market and industry research
Separate recurring forecasts, risk factors, and disagreements across expert channels, with evidence for each finding.
Brand and competitor monitoring
Find relevant statements even when the brand is absent from the title, then open the exact moment.
Multilingual briefings
Deliver answers in the team's UI language while retaining every original excerpt.
Grounded agent retrieval
Provide short, citable statements and provenance as context instead of treating search results as facts.
A public interface agents can discover and use
1. Discover
Find public pages in robots.txt and the sitemap, then read llms.txt or the capability manifest.
2. Call
Send one target and one question through OpenAPI REST or the get_youtube_evidence remote MCP tool.
3. Verify
Follow answers[].evidence_indices to the original excerpt and its timestamped watch_url.
4. Retry
Keep the same Idempotency-Key to safely replay the exact result and usage state.
Get three findings across a channel
curl -X POST https://tubesignal.net/api/v1/evidence/query \
-H "Content-Type: application/json" \
-H "Idempotency-Key: channel-briefing-001" \
-d '{"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}'Remote MCP: https://tubesignal.net/mcp · get_youtube_evidence
Frequently asked questions
How many videos does one query search?
A channel query searches up to 20 collected videos from the past 30 days. Check coverage.videos_searched for the actual count.
Can one question return multiple answers?
Yes. Set answer_count from 1 to 4. The API returns fewer rather than inventing findings when evidence is limited.
How are originals and translations separated?
evidence.text is always the source transcript. When needed, a translation is added only as translated_text.
Can I test it for free?
Fixed sample channels allow three successful anonymous calls every 24 hours. Requests that do not produce an answer do not consume the allowance. A verified key includes 20 successful Evidence Packs over 30 days.
Evidence of what was said—not an external truth verdict
TubeSignal finds statements in public YouTube videos. It does not verify claims outside the videos, explicitly abstains when evidence is insufficient, and never returns a full transcript.
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