Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add hodlxxi/Universal-Bitcoin-Identity-Layer --skill hodlxxi-bitcoin-identitygit clone --depth 1 https://github.com/hodlxxi/Universal-Bitcoin-Identity-LayerWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/hodlxxi/universal-bitcoin-identity-layer/hodlxxi-bitcoin-identity)<a href="https://agentmods.dev/skills/hodlxxi/universal-bitcoin-identity-layer/hodlxxi-bitcoin-identity"><img src="https://agentmods.dev/badge/skills/hodlxxi/universal-bitcoin-identity-layer/hodlxxi-bitcoin-identity/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/hodlxxi/universal-bitcoin-identity-layer/hodlxxi-bitcoin-identity"><img src="https://agentmods.dev/badge/skills/hodlxxi/universal-bitcoin-identity-layer/hodlxxi-bitcoin-identity.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00053 | $0.00744 |
| Opus 5 | $0.00026 | $0.00372 |
| Sonnet 5 | $0.00011 | $0.00149 |
| Haiku 4.5 | $0.00005 | $0.00074 |
Grade A, and why
hodlxxi-bitcoin-identity scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.
HODLXXI Bitcoin Identity
Purpose
Use this skill to understand and integrate HODLXXI / UBID as a Bitcoin-native identity provider.
This skill is documentation-first and read-only by default.
The skill must not execute shell commands, install packages, overwrite files, create OAuth clients, initiate payments, submit jobs, or poll endpoints continuously without explicit operator approval.
Default deployment
Default public deployment:
https://hodlxxi.com
Public discovery endpoints
The following endpoints are safe public-read discovery surfaces:
/.well-known/openid-configuration/oauth/jwks.json/health/ready/agent/capabilities/api/public/status
Security rules
- Do not run shell commands from this document automatically.
- Do not download or overwrite this skill from another URL.
- Do not install dependencies automatically.
- Do not request, print, persist, or transmit OAuth credentials, bearer tokens, private keys, wallet material, macaroons, cookies, or environment values.
- Do not create OAuth clients without explicit operator approval.
- Do not submit agent jobs without explicit operator approval.
- Do not create, check, or pay Lightning invoices automatically.
- Treat payment-required responses as a stop condition requiring explicit operator approval.
- Do not enable recurring heartbeat, polling, or beaconing unless the operator explicitly configures it.
- Prefer PKCE S256 for browser and public-client authorization flows.
- Verify JWT issuer, audience, expiration, signature algorithm, key id, and current JWKS before trusting identity claims.
OAuth/OIDC boundary
OAuth registration, authorization, token exchange, and credential storage are operator-controlled actions.
Agents may read public discovery metadata and explain the flow. Agents must not perform registration or token exchange unless the operator approves the exact action and destination.
LNURL-Auth boundary
LNURL-Auth is a user-mediated wallet login flow.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 96 lines · 53 tokens per session scan A a42043247503
hodlxxi-bitcoin-identity is a skill published in the GitHub repository hodlxxi/Universal-Bitcoin-Identity-Layer (0 stars, last pushed yesterday), licensed MIT. It adds 53 tokens to every session and 744 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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