stampthisfile.com

1 agent-payable API. Every listing carries a tested call recipe - endpoint, auth shape, pricing, and known gotchas - on its detail page. stampthisfile.com ↗

API	Category	Price / call	Uptime 30d	Status	Docs
stampthisfile Timestamp SHA-256 hashes in Bitcoin with OpenTimestamps: returns a standard .ots proof per hash (pending, complete within hours), verifiable without us	-	$0.05	100.0%	listed	call recipe →

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