username.md
Persistent, verifiable digital identity for humans and AI agents.
A startup from the United States, founded by Chris Bergeron.
Persistent, verifiable digital identity for humans and AI agents.
A startup from the United States, founded by Chris Bergeron.
This page is designed to help you find out whether username.md is good and if it is the right choice for you.
username.md gives people and AI agents an internet identity they actually own.
Instead of identity living only inside a platform, account, or application, username.md provides a persistent, web-addressable identity that can be independently resolved and verified across the web.
For people, username.md creates a single identity address that both humans and software can read. Users can connect existing accounts and proofs while maintaining an identity that isn't dependent on any one platform.
For AI agents, username.md provides a persistent identity that can remain recognizable and verifiable across applications, tools, and environments. Agents can have their own web-addressable identity, DID, signed claims, machine-readable information, and scoped API access controlled by their owner.
Developers can resolve and verify identities programmatically using APIs and open standards including did:web, Ed25519 signatures, RFC 9421, W3C Verifiable Credentials, JSON-LD, JWS, OpenAPI 3.1, and MCP-based identity resolution.
username.md is designed for an internet where people, applications, and autonomous agents need to know not just what an account is called, but who or what it represents — and whether that identity can be verified.
Listed in
Persistent Digital Identity
A web-addressable identity for people and AI agents that they control and can use across the open web.
Machine-Verifiable Identity
Supports did:web, signed claims and responses, W3C Verifiable Credentials, and RFC 9421 HTTP Message Signatures.
Developer & Agent APIs
OpenAPI 3.1 and MCP-based identity resolution and verification for applications and AI agents.
Cryptographic Verification
Ed25519 signatures enable software to verify identity data and signed responses.
Portable Identity
Identity is designed to work across platforms instead of being locked to a single service.
Account & Domain Binding
Connect identity to existing proofs such as domains, GitHub, Bluesky, and Keybase.
username.md gives people and AI agents an internet identity they actually own. Each identity is persistent, web-addressable and machine-verifiable, with support for open standards including did:web, signed claims and responses, W3C Verifiable Credentials, RFC 9421 and machine-readable identity resolution. The same identity can be understood by people, applications and AI agents across the open web.
Unlike platform-specific profiles or identifiers, username.md is designed to be portable and independently verifiable. Your identity has its own web address, can connect to existing accounts and proofs, and can be resolved by both humans and software. It is built around ownership, open standards and interoperability rather than locking identity inside a single platform.
username.md is built for people, developers, businesses and AI-agent builders who need persistent, portable and verifiable digital identity. It is especially relevant for developers building AI agents and applications that need to resolve and verify identity programmatically across platforms and environments.
username.md uses open identity and web standards including did:web decentralized identifiers, Ed25519 cryptographic signatures, RFC 9421 HTTP Message Signatures, W3C Verifiable Credentials, JSON-LD, JWS, OpenAPI 3.1 and MCP-based identity resolution and verification.
Chris has imagined the idea of a universal identity for quite some time. He wrote a blog post about the topic in 2022 and the idea persisted.
As Ai permeated the internet, the idea of an individually routable internet identity became more prescient than ever.
Everyone has an email address, some people have a domain, but there was no one identity standard that empowered the end user, provides control levers for how their identity is managed and interpreted on the internet, and cryptographically provable by anyone.
username.md was created around this simple idea: your website is where you publish, but your username.md is who you are. As the internet becomes increasingly shaped by AI agents and machine-to-machine interactions, identity needs to be readable and verifiable by software as well as people. username.md is building an open identity layer where people and AI agents can have persistent identities they control.
username.md serves individuals, developers, businesses and AI-agent builders. We do not publicly disclose individual customer names.
We have collected here some useful links to help you find out if username.md is good.
Check the traffic stats of username.md on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of username.md on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of username.md's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of username.md on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about username.md on Reddit. This can help you find out how popualr the product is and what people think about it.
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Is username.md good? This is an informative page that will help you find out. Moreover, you can review and discuss username.md here. The primary details have been verified within the last quarter. So they could be considered up to date. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.
