The stampd Blockchain Time Stamping API creates notarized documents with a cryptographic hash. It is available with JSON objects and GET methods. Authentication is accessible with client_id and secret_key. Users can obtain a stamped document by investing EUR 0.09 (9 cents) via PayPal. To stamp a document, visit https://stampd.io/
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08-12-17 17:11:04[Brief] ProgrammableWeb's Most Interesting APIs in 2017: Payments, Banking, Blockchain and Finance updated with Related API stampd Blockchain Time Stamping
18-06-17 15:53:54Added Block to the Category.
16-03-17 15:32:47[Brief] Daily API RoundUp: SmartSurvey, stampd, Symphony, Density, Foobot updated with Related API stampd Blockchain Time Stamping