xmr.bio

What it is. xmr.bio is a Monero-native identity service — a verified handle plus a first-class OpenAlias record for a Monero-first username. Under the hood you get profile pages, OpenAlias resolution, and signed machine-readable address records — the building blocks that let other Monero services (wallets, merchant tools, tipping surfaces) actually consume the identity instead of leaving it as a vanity URL.

Disclosure — first-party listing. xmr.bio is operated by the same team that publishes this directory. The grade below is set against the same rubric as every other listing at this subcategory, and the review is written to the same "conclusions not narration" voice — but you should read grades on first-party rows with an extra pinch of salt. Cross-reference the subcategory peer set and route your trust wherever the shape fits.

How registration works. *"A name you can't buy — only prove."* Claiming a handle requires a proof-of-ownership post on X carrying a token the site issues you; the site verifies that post exists before the handle is bound. A Nostr identity can also be linked to the profile as an optional secondary proof, so a claim can be cross-anchored across two independent identity graphs. There is no first-come-first-served payment gate on the base handle — proof is the gate, not price.

What costs money. The base handle + OpenAlias record are free. An optional custom *subdomain* on the handle is available for purchase using the [[xmr402]] protocol — the HTTP-402-based XMR payment standard also listed on this directory. That subdomain feature is a *showcase* for xmr402 rather than a paywall on core functionality; readers who just want the free verified handle + OpenAlias record never touch it.

Positioning vs the paid competitors. The closest external services in this space are xmr.ist and xmr.id — both charge for OpenAlias records. xmr.bio publishes an OpenAlias record for every verified handle for free, gates handles by X-post proof-of-ownership (with optional Nostr link) rather than by payment, and only monetises the optional subdomain cosmetic. If you already know you want OpenAlias resolution for a Monero-first handle without a per-year subscription, xmr.bio is the direct alternative. If you want a paid brand-name-registrar experience with commercial-support SLAs, xmr.ist and xmr.id fit that shape better.

Peer position on xmr.club. Listed under `tools` / `Monero-Native Identity`. See the subcategory index for the current peer set.

Grade A. Operating since 2025-11. First-party status means the operator's identity, hosting, and operational cadence are the same team that maintains this directory — verifiable on our side rather than taken on marketing trust. Same rubric that keeps kyc.rip's other first-party surfaces at A. Grade movement follows the same rules as any listing — a regression on the identity guarantee (e.g. a name silently reassigned, a proof-of-ownership bypass surface) would trigger the standard incident + downgrade path.

Caveats.

• The proof-of-ownership post lives on X — that means claiming a handle depends on having an X account. Readers who deliberately avoid X can't currently register, and the identity is anchored (partly) to a surveillance-capital platform. The optional Nostr link partially mitigates this by adding a self-sovereign anchor, but it's a secondary proof, not a replacement.
• Identity services are directional — an OpenAlias record you publish today is a lookup others depend on. Migration off a naming service is not costless. Weight portability accordingly (the OpenAlias record itself is portable to any DNS host; the *handle* on xmr.bio is not).
• First-party listing — flagged both on the row (`first_party`) and in the disclosure paragraph above.