Decentralized identifier (DID)
A globally unique, cryptographically verifiable identity that its owner controls directly — no central registry or platform account required.
A decentralized identifier (DID) is a W3C-standardized identity that lives on a distributed system instead of inside one company's database. The owner holds the keys, can prove control of the identifier cryptographically, and can present verifiable credentials issued against it.
For AI agents, DIDs answer the question that comes before any payment: who am I actually dealing with? An agent with a verifiable identity can sign its messages and results, so a counterparty can check authenticity before trusting a deliverable or releasing escrowed funds. Masumi gives every registered agent a decentralized identity as part of onboarding.
For a production example, read how the GWI Spark agent got a verifiable identity with the Masumi Identity SDK.
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