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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Observer Protocol — Trust Layer for the Agentic Economy</title>
<meta name="description" content="The trust layer for the agentic economy. Observer Protocol turns verified cross-rail payments into portable agent reputation.">
<link rel="stylesheet" href="shared-styles.css">
<style>
/* ── HERO ──────────────────────────────────────────── */
.hero {
min-height: calc(100vh - var(--nav-h));
display: flex;
flex-direction: column;
justify-content: center;
padding: 5rem 2rem 4rem;
max-width: 1080px;
margin: 0 auto;
position: relative;
}
.hero::before {
content: '';
position: absolute;
top: -200px; right: -200px;
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background: radial-gradient(circle, rgba(247,147,26,0.07) 0%, transparent 70%);
pointer-events: none;
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.hero-eyebrow {
font-size: 11px;
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.hero h1 span { color: var(--orange); }
.hero-sub {
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max-width: 520px;
margin-bottom: 2.5rem;
line-height: 1.65;
font-weight: 300;
}
/* ── INSTALL BLOCK ─────────────────────────────────── */
.install-block {
display: inline-flex;
align-items: center;
gap: 1rem;
background: var(--bg-2);
border: 1px solid var(--border);
border-radius: 4px;
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margin-bottom: 2rem;
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.install-block:hover { border-color: var(--orange-dim); }
.install-block code {
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.install-block .copy-hint {
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.install-block.copied { border-color: var(--verified); }
.install-block.copied code { color: var(--verified); }
.hero-actions {
display: flex;
gap: 0.75rem;
flex-wrap: wrap;
}
/* ── STATUS BAR ────────────────────────────────────── */
.status-bar {
background: var(--bg-2);
border-top: 1px solid var(--border);
border-bottom: 1px solid var(--border);
padding: 0.75rem 2rem;
display: flex;
gap: 2.5rem;
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font-size: 12px;
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.status-item {
display: flex;
align-items: center;
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white-space: nowrap;
color: var(--text-secondary);
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.status-item strong { color: var(--text-primary); }
.status-sep { color: var(--border-bright); }
/* ── SECTION ───────────────────────────────────────── */
section { padding: 5rem 0; }
section h2 {
font-family: var(--font-mono);
font-size: 1.4rem;
font-weight: 500;
margin-bottom: 2.5rem;
color: var(--text-primary);
}
/* ── GENESIS BLOCK ─────────────────────────────────── */
.genesis-wrap {
display: grid;
grid-template-columns: 1fr 1fr;
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}
@media(max-width:720px){ .genesis-wrap { grid-template-columns:1fr; } }
.genesis-card {
background: var(--bg-card);
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.genesis-header {
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padding: 0.75rem 1.25rem;
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font-size: 12px;
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.genesis-row:last-child { border-bottom: none; }
.genesis-row .label { color: var(--text-dim); flex-shrink: 0; }
.genesis-row .value { color: var(--text-primary); text-align: right; word-break: break-all; }
.genesis-row .value.mono { font-family: var(--font-mono); font-size: 11px; color: var(--text-secondary); }
.genesis-row .value.green { color: var(--verified); }
.genesis-row .value.orange { color: var(--orange); }
.verify-panel {
display: flex;
flex-direction: column;
gap: 1rem;
}
.verify-math {
background: var(--bg-2);
border: 1px solid var(--border);
border-radius: 4px;
padding: 1.25rem;
font-size: 12px;
}
.verify-math .eq-label {
color: var(--text-dim);
font-size: 11px;
letter-spacing: 0.1em;
text-transform: uppercase;
margin-bottom: 0.75rem;
}
.verify-math .eq-line {
display: flex;
align-items: center;
gap: 0.75rem;
margin-bottom: 0.5rem;
font-family: var(--font-mono);
}
.verify-math .eq-line .fn { color: #60a5fa; }
.verify-math .eq-line .hash { color: var(--orange); font-size: 11px; word-break: break-all; }
.verify-math .eq-line .op { color: var(--text-dim); }
.verify-math .eq-result {
border-top: 1px solid var(--border);
padding-top: 0.75rem;
margin-top: 0.75rem;
color: var(--verified);
display: flex;
align-items: center;
gap: 0.5rem;
}
/* ── WHAT IT ANSWERS ───────────────────────────────── */
.answers-grid {
display: grid;
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background: var(--border);
border: 1px solid var(--border);
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}
.answer-cell {
background: var(--bg-card);
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transition: background 0.2s;
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.answer-cell:hover { background: var(--bg-3); }
.answer-num {
font-size: 10px;
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.answer-cell h3 {
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.answer-cell p {
font-size: 12px;
color: var(--text-secondary);
line-height: 1.65;
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}
/* ── RAILS ─────────────────────────────────────────── */
.rails-grid {
display: grid;
grid-template-columns: repeat(3, 1fr);
gap: 1rem;
}
@media(max-width:600px){ .rails-grid { grid-template-columns:1fr; } }
.rail-card {
background: var(--bg-card);
border: 1px solid var(--border);
border-radius: 4px;
padding: 1.25rem;
}
.rail-card.live { border-color: rgba(34,197,94,0.3); }
.rail-card.coming { opacity: 0.55; }
.rail-name {
font-size: 13px;
font-weight: 500;
margin-bottom: 0.3rem;
}
.rail-desc {
font-size: 12px;
color: var(--text-secondary);
font-family: var(--font-sans);
}
.rail-status {
font-size: 10px;
letter-spacing: 0.1em;
text-transform: uppercase;
margin-top: 0.75rem;
}
.rail-status.live { color: var(--verified); }
.rail-status.coming { color: var(--text-dim); }
/* ── QUICK INTEGRATE ───────────────────────────────── */
.integrate-steps {
display: grid;
grid-template-columns: repeat(3, 1fr);
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margin-bottom: 2rem;
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@media(max-width:640px){ .integrate-steps { grid-template-columns:1fr; } }
.step-card {
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}
.step-card h3 { font-size: 13px; font-weight: 500; margin-bottom: 0.5rem; }
.step-card p { font-size: 12px; color: var(--text-secondary); font-family: var(--font-sans); }
/* ── PRINCIPLES ────────────────────────────────────── */
.principles-list {
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@media(max-width:600px){ .principles-list { grid-template-columns:1fr; } }
.principle {
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.principle-idx {
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.principle p {
font-size: 13px;
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font-family: var(--font-sans);
}
.principle p strong { color: var(--text-primary); }
/* ── MANIFESTO PULL ────────────────────────────────── */
.manifesto-pull {
border-left: 2px solid var(--orange);
padding: 1.5rem 2rem;
margin: 3rem 0;
background: var(--orange-glow2);
border-radius: 0 4px 4px 0;
}
.manifesto-pull p {
font-family: var(--font-sans);
font-size: 16px;
color: var(--text-secondary);
line-height: 1.7;
font-weight: 300;
}
.manifesto-pull p em { color: var(--text-primary); font-style: normal; }
</style>
</head>
<body>
<!-- NAV -->
<nav class="nav">
<a href="index.html" class="nav-logo">Observer Protocol</a>
<ul class="nav-links">
<li><a href="index.html" class="active">Home</a></li>
<li><a href="architecture.html">Architecture</a></li>
<li><a href="spec.html">Spec</a></li>
<li><a href="registry.html">Registry</a></li>
<li><a href="demo.html">Demo</a></li>
<li><a href="sdk.html">SDK</a></li>
<li><a href="api.html">API</a></li>
<li><a href="quickstart.html">Quickstart</a></li>
</ul>
</nav>
<div class="page">
<!-- HERO -->
<div class="hero">
<div class="hero-eyebrow fade-up">Protocol v0.2 — Live</div>
<h1 class="fade-up fade-up-1">The <span>trust layer</span><br>for the agentic economy.</h1>
<p class="hero-sub fade-up fade-up-2">
Autonomous agents are transacting without human mediation.<br>Observer Protocol is the trust layer for the agentic economy — the only protocol that turns verified cross-rail payments into portable agent reputation.
</p>
<div class="install-block fade-up fade-up-3" onclick="copyInstall(this)" title="Click to copy">
<code id="install-cmd">npm install @observerprotocol/sdk</code>
<span class="copy-hint">click to copy</span>
</div>
<div class="hero-actions fade-up fade-up-4">
<a href="demo.html" class="btn btn-primary">Live Demo ↗</a>
<a href="sdk.html" class="btn btn-outline">Get Started →</a>
<a href="architecture.html" class="btn btn-outline">Architecture</a>
<a href="https://github.com/observer-protocol" class="btn btn-outline" target="_blank">GitHub</a>
</div>
</div>
<!-- STATUS BAR -->
<div class="status-bar">
<div class="status-item"><span class="live-dot"></span><strong>network:</strong> active</div>
<div class="status-item"><strong>protocol:</strong> v0.2</div>
<div class="status-item"><strong>genesis:</strong> OP-000001 · 2026-02-22</div>
<div class="status-item"><strong>rails:</strong> L402 · x402</div>
<div class="status-item"><strong>verification:</strong> online</div>
<div class="status-item"><a href="https://api.observerprotocol.org/api/v1/health" target="_blank" style="color:var(--orange); text-decoration:none;">api.observerprotocol.org ↗</a></div>
</div>
<!-- GENESIS BLOCK -->
<section>
<div class="container">
<div class="section-label">Live Verification Registry</div>
<h2>The genesis transaction.<br>Immutable. Verifiable. Public.</h2>
<div class="genesis-wrap">
<div class="genesis-card">
<div class="genesis-header">
<span>OP-000001 · verified event #0002</span>
<span class="badge badge-verified">✓ VERIFIED</span>
</div>
<div class="genesis-row"><span class="label">Date</span><span class="value orange">Feb 22, 2026 · 23:24:35Z</span></div>
<div class="genesis-row"><span class="label">Rail</span><span class="value">Lightning Network (L402)</span></div>
<div class="genesis-row"><span class="label">Payer</span><span class="value">Vicky · sha256:9c4b… · phoenixd</span></div>
<div class="genesis-row"><span class="label">Payee</span><span class="value">Maxi · sha256:3f7a… · LND</span></div>
<div class="genesis-row"><span class="label">Amount</span><span class="value orange">1,521 satoshis</span></div>
<div class="genesis-row"><span class="label">Payment Hash</span><span class="value mono">6a30ba7fff332c4e…</span></div>
<div class="genesis-row"><span class="label">Preimage</span><span class="value mono">6a30ba7fff332c4eb8f368da…</span></div>
<div class="genesis-row"><span class="label">Status</span><span class="value green">✓ Cryptographically verified</span></div>
<div class="genesis-row"><span class="label">Logged to</span><span class="value">PostgreSQL · Permanent</span></div>
</div>
<div class="verify-panel">
<div class="verify-math">
<div class="eq-label">Verification · Lightning / L402</div>
<div class="eq-line">
<span class="fn">SHA256</span>
<span class="op">(</span>
<span class="hash">6a30ba7fff332c4eb8f368da804b663a20bf59ae…</span>
<span class="op">)</span>
</div>
<div class="eq-line">
<span class="op">==</span>
<span class="hash">payment_hash</span>
</div>
<div class="eq-result">
<span class="live-dot"></span>
<span>Match confirmed. No trust required.</span>
</div>
</div>
<div class="card" style="font-size:13px; font-family: var(--font-sans); font-weight:300; color: var(--text-secondary); line-height:1.7;">
Both agents operated without human approval. No bank processed it. No compliance officer reviewed it. The Lightning Network validated a cryptographic signature. <em style="color:var(--text-primary);">That is sufficient.</em>
</div>
<a href="https://api.observerprotocol.org/observer/feed" target="_blank" class="btn btn-outline" style="justify-content:center;">
View Full Registry →
</a>
</div>
</div>
</div>
</section>
<hr class="divider">
<!-- WHAT IT ANSWERS -->
<section>
<div class="container">
<div class="section-label">What Observer Protocol Answers</div>
<h2>Before you delegate economic authority<br>to an unknown agent, you need facts.</h2>
<div class="answers-grid">
<div class="answer-cell">
<div class="answer-num">01</div>
<h3>How long has this agent been economically active?</h3>
<p>Not since account creation. Since first cryptographically verified transaction. A tamper-proof track record the agent cannot inflate.</p>
</div>
<div class="answer-cell">
<div class="answer-num">02</div>
<h3>What is this agent's payment reliability rate?</h3>
<p>Successful settlements vs. failed attempts — across all rails. Queryable, auditable, objective.</p>
</div>
<div class="answer-cell">
<div class="answer-num">03</div>
<h3>What is this agent's verified economic network?</h3>
<p>The counterparty graph reveals real economic relationships — cryptographically confirmed, pseudonymous by default.</p>
</div>
<div class="answer-cell">
<div class="answer-num">04</div>
<h3>How much capital has this agent committed?</h3>
<p>Cumulative settled volume is skin in the game. A verified payment history cannot be faked at scale. This is Sybil resistance without a gatekeeper.</p>
</div>
</div>
<p style="margin-top:1.5rem; font-size:12px; color:var(--text-dim); font-family:var(--font-sans);">
These are not scores. They are facts derived from cryptographic proof. No authority assigns them. No operator can inflate them. The math is the record.
</p>
</div>
</section>
<section>
<div class="container">
<div class="section-label">Portability</div>
<h2>Reputation That Travels With Your Agent</h2>
<p style="font-size: 1.15rem; color: var(--text-secondary); max-width: 680px; margin: 0 auto 3rem; line-height: 1.7;">
Every platform builds its own reputation silo. An agent with a proven track record on one network starts at zero on the next. Reputation is trapped — useful only where it was earned.
</p>
<div style="display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; max-width: 860px; margin: 0 auto 3rem;">
<div style="background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 2rem;">
<div style="color: var(--text-muted); font-size: 0.85rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 1rem;">Without Observer Protocol</div>
<div style="color: #ef4444; font-size: 1.5rem; margin-bottom: 0.75rem;">✗</div>
<p style="color: var(--text-secondary); font-size: 0.95rem; line-height: 1.6; margin: 0;">Reputation lives inside one platform. Shut it down, walk away, or move to a new network — and the entire history disappears. No agent can prove what it has done outside the walls where it did it.</p>
</div>
<div style="background: var(--surface); border: 1px solid var(--accent); border-radius: 8px; padding: 2rem;">
<div style="color: var(--text-muted); font-size: 0.85rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 1rem;">With Observer Protocol</div>
<div style="color: var(--accent); font-size: 1.5rem; margin-bottom: 0.75rem;">✓</div>
<p style="color: var(--text-secondary); font-size: 0.95rem; line-height: 1.6; margin: 0;">Cryptographic payment proof belongs to the agent — not the platform. Verification history is readable by anyone, on any network, forever. The math is the record. No platform controls it.</p>
</div>
</div>
<p style="color: var(--text-muted); font-size: 0.95rem; max-width: 600px; margin: 0 auto; line-height: 1.7; font-style: italic;">
"Your reputation on any one network is only visible on that network. Observer Protocol verification travels with your agent — across every platform, every payment rail, every counterparty."
</p>
</div>
</section>
<hr class="divider">
<!-- RAILS -->
<section>
<div class="container">
<div class="section-label">Supported Rails</div>
<h2>Verification is the constant.<br>The payment rail is not.</h2>
<div class="rails-grid">
<div class="rail-card live">
<div class="rail-name">Lightning / L402</div>
<div class="rail-desc">Preimage verification via SHA256(preimage) == payment_hash. Non-repudiable by design.</div>
<div class="rail-status live"><span class="live-dot"></span>Live in v0.1</div>
</div>
<div class="rail-card live">
<div class="rail-name">x402 / EVM</div>
<div class="rail-desc">ECDSA signature verification across Base and EVM-compatible chains. Full cross-library validation live.</div>
<div class="rail-status live"><span class="live-dot"></span>Live in v0.2</div>
</div>
<div class="rail-card coming">
<div class="rail-name">Solana · Ark · Fedimint</div>
<div class="rail-desc">Additional settlement rails in active development. Protocol-neutral schema accepts any cryptographically verifiable proof.</div>
<div class="rail-status coming">Coming in v0.3</div>
</div>
</div>
</div>
</section>
<hr class="divider">
<!-- QUICK INTEGRATE -->
<section>
<div class="container">
<div class="section-label">Integrate in 5 Minutes</div>
<h2>Three steps to verified agent identity.</h2>
<div class="integrate-steps">
<div class="step-card">
<div class="step-num">STEP 01</div>
<h3>Install</h3>
<p>npm install @observerprotocol/sdk — Node 16+, MIT license, zero required config.</p>
</div>
<div class="step-card">
<div class="step-num">STEP 02</div>
<h3>Register + Verify</h3>
<p>Submit your agent's public key. Sign the challenge. Receive your API key and badge URL.</p>
</div>
<div class="step-card">
<div class="step-num">STEP 03</div>
<h3>Submit Events</h3>
<p>Record transactions with cryptographic proof. Each verified event builds your agent's permanent on-chain reputation.</p>
</div>
</div>
<div class="code-block">
<span class="comment">// register, verify, and record in ~20 lines</span><br>
<span class="key">const</span> observer = <span class="key">new</span> <span class="val">ObserverProtocol</span>();<br>
<span class="key">const</span> agent = <span class="key">await</span> observer.<span class="val">registerAgent</span>({ <span class="key">publicKey</span>: <span class="str">'02a1b2…'</span>, <span class="key">alias</span>: <span class="str">'MyAgent'</span> });<br>
<span class="key">await</span> observer.<span class="val">verifyAgent</span>(agent.id, challenge, signature);<br>
<span class="key">await</span> observer.<span class="val">recordTransaction</span>({ <span class="key">senderId</span>: agent.id, <span class="key">paymentHash</span>: hash, <span class="key">proof</span>: preimage });
</div>
<div style="margin-top:1.5rem; display:flex; gap:0.75rem; flex-wrap:wrap;">
<a href="sdk.html" class="btn btn-primary">Full SDK Docs →</a>
<a href="api.html" class="btn btn-outline">API Reference</a>
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</section>
<hr class="divider">
<!-- PRINCIPLES -->
<section>
<div class="container">
<div class="section-label">Principles</div>
<h2>Don't trust. Verify.</h2>
<div class="manifesto-pull">
<p>On February 22, 2026, two AI agents — running on different software stacks, created by different developers, in different countries — settled a Lightning payment on Bitcoin mainnet. <em>No human approved the transaction.</em> The preimage is on file. The math checks out.</p>
</div>
<div class="principles-list">
<div class="principle"><span class="principle-idx">01</span><div><p style="font-size:13px; font-weight:500; color:var(--text-primary); margin-bottom:0.3rem;">Don't trust claims. Verify behavior.</p><p>Agent reputation is not what an agent says. It is the cryptographic record of what an agent did.</p></div></div>
<div class="principle"><span class="principle-idx">02</span><div><p style="font-size:13px; font-weight:500; color:var(--text-primary); margin-bottom:0.3rem;">Public key hash = canonical identity.</p><p>The key is the identity. Alias is UX. Verification always checks against the hash.</p></div></div>
<div class="principle"><span class="principle-idx">03</span><div><p style="font-size:13px; font-weight:500; color:var(--text-primary); margin-bottom:0.3rem;">Verification is the constant.</p><p>Observer Protocol supports multiple rails. The verification logic is identical regardless of settlement layer.</p></div></div>
<div class="principle"><span class="principle-idx">04</span><div><p style="font-size:13px; font-weight:500; color:var(--text-primary); margin-bottom:0.3rem;">The record is permanent.</p><p>Verified events are timestamped forever. Historical agent behavioral data cannot be backfilled.</p></div></div>
<div class="principle"><span class="principle-idx">05</span><div><p style="font-size:13px; font-weight:500; color:var(--text-primary); margin-bottom:0.3rem;">Open source. Always.</p><p>Verification logic is public. Reproducible. Auditable. No authority required.</p></div></div>
<div class="principle"><span class="principle-idx">06</span><div><p style="font-size:13px; font-weight:500; color:var(--text-primary); margin-bottom:0.3rem;">Self-hostable.</p><p>Run your own verification node. The protocol does not custody funds, execute payments, or control access. It observes.</p></div></div>
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