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Countersign by Signalry

Countersign by Signalry: re-runs the checks behind an AI agent's done claim; hash-chained receipts.

MCP serverAgents

What we know

MCP serverYessource, checked 2026-11-13

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For the team behind Countersign by Signalry

Growth plan: from $399 a month

SEO, AI search (how ChatGPT, Perplexity and Google describe Countersign by Signalry), UX, CRO and support from one account manager, with a monthly report. Includes a Featured launch on db.fyi. Starts with a free audit.

Founding offer: $299 a month for your first 3 months, plus a free case study.

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Listed 2026-11-13 · updated 2026-11-13