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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>API Reference — Observer Protocol</title>
<meta name="description" content="Observer Protocol API reference. Base URL: api.observerprotocol.org">
<link rel="stylesheet" href="shared-styles.css">
<style>
.page-hero {
padding: 4rem 0 3rem;
border-bottom: 1px solid var(--border);
}
.page-hero h1 {
font-size: clamp(1.8rem, 4vw, 2.8rem);
font-weight: 600;
line-height: 1.15;
margin-bottom: 0.75rem;
}
.page-hero p {
font-family: var(--font-sans);
color: var(--text-secondary);
font-size: 15px;
font-weight: 300;
max-width: 480px;
margin-bottom: 1.5rem;
}
.base-url {
display: inline-flex;
align-items: center;
gap: 0.75rem;
background: var(--bg-2);
border: 1px solid var(--border);
padding: 0.6rem 1rem;
border-radius: 3px;
font-size: 13px;
}
.base-url .label { color: var(--text-dim); }
.base-url .url { color: var(--orange); }
/* ── LAYOUT ────────────────────────────────────────── */
.api-layout {
display: grid;
grid-template-columns: 220px 1fr;
gap: 3rem;
padding: 3rem 0;
align-items: start;
}
@media(max-width:720px) { .api-layout { grid-template-columns:1fr; } }
/* ── SIDEBAR ───────────────────────────────────────── */
.api-sidebar {
position: sticky;
top: calc(var(--nav-h) + 2rem);
}
.sidebar-group { margin-bottom: 1.5rem; }
.sidebar-group-label {
font-size: 10px;
letter-spacing: 0.12em;
text-transform: uppercase;
color: var(--text-dim);
margin-bottom: 0.5rem;
padding-left: 0.5rem;
}
.sidebar-link {
display: flex;
align-items: center;
gap: 0.5rem;
padding: 0.35rem 0.5rem;
border-radius: 3px;
font-size: 12px;
color: var(--text-secondary);
text-decoration: none;
transition: all 0.15s;
border-left: 2px solid transparent;
}
.sidebar-link:hover { color: var(--text-primary); background: var(--bg-2); }
.sidebar-link.active { color: var(--orange); border-left-color: var(--orange); }
.method-tag {
font-size: 9px;
font-weight: 600;
letter-spacing: 0.05em;
padding: 0.1rem 0.3rem;
border-radius: 2px;
min-width: 30px;
text-align: center;
}
.get { background: rgba(96,165,250,0.15); color: #60a5fa; }
.post { background: rgba(34,197,94,0.15); color: #22c55e; }
/* ── ENDPOINT CARDS ────────────────────────────────── */
.endpoint-section { margin-bottom: 3rem; }
.endpoint-section-title {
font-size: 11px;
letter-spacing: 0.12em;
text-transform: uppercase;
color: var(--text-dim);
margin-bottom: 1rem;
padding-bottom: 0.5rem;
border-bottom: 1px solid var(--border);
}
.endpoint {
background: var(--bg-card);
border: 1px solid var(--border);
border-radius: 4px;
margin-bottom: 0.75rem;
overflow: hidden;
transition: border-color 0.15s;
}
.endpoint:hover { border-color: var(--border-bright); }
.endpoint-header {
display: flex;
align-items: center;
gap: 1rem;
padding: 1rem 1.25rem;
cursor: pointer;
user-select: none;
}
.endpoint-path {
font-family: var(--font-mono);
font-size: 13px;
color: var(--text-primary);
flex: 1;
}
.endpoint-summary {
font-size: 12px;
color: var(--text-secondary);
font-family: var(--font-sans);
}
.endpoint-toggle { color: var(--text-dim); font-size: 12px; transition: transform 0.2s; }
.endpoint.open .endpoint-toggle { transform: rotate(90deg); }
.endpoint-body {
display: none;
padding: 0 1.25rem 1.25rem;
border-top: 1px solid var(--border);
}
.endpoint.open .endpoint-body { display: block; }
.param-table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: 12px; }
.param-table th {
text-align: left;
padding: 0.4rem 0.75rem;
font-size: 10px;
letter-spacing: 0.1em;
text-transform: uppercase;
color: var(--text-dim);
border-bottom: 1px solid var(--border);
}
.param-table td { padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.param-table tr:last-child td { border-bottom: none; }
.param-name { color: var(--orange); font-family: var(--font-mono); }
.param-type { color: #60a5fa; font-family: var(--font-mono); font-size: 11px; }
.param-req { color: var(--verified); font-size: 10px; text-transform: uppercase; }
.param-opt { color: var(--text-dim); font-size: 10px; text-transform: uppercase; }
.param-desc { color: var(--text-secondary); font-family: var(--font-sans); }
.response-label {
font-size: 10px;
letter-spacing: 0.1em;
text-transform: uppercase;
color: var(--text-dim);
margin: 1rem 0 0.5rem;
}
/* ── TRY IT BUTTON ─────────────────────────────────── */
.try-it-link {
display: inline-flex;
align-items: center;
gap: 0.4rem;
font-size: 11px;
color: var(--orange);
text-decoration: none;
border: 1px solid rgba(247,147,26,0.3);
padding: 0.25rem 0.6rem;
border-radius: 2px;
margin-top: 0.75rem;
transition: all 0.15s;
}
.try-it-link:hover { background: var(--orange-glow2); }
</style>
</head>
<body>
<nav class="nav">
<a href="index.html" class="nav-logo">Observer Protocol</a>
<ul class="nav-links">
<li><a href="index.html">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" class="active">API</a></li>
<li><a href="quickstart.html">Quickstart</a></li>
</ul>
</nav>
<div class="page">
<div class="page-hero">
<div class="container">
<div class="section-label">API Reference · v1.0 · OAS 3.1</div>
<h1>API Reference</h1>
<p>Canonical structured database for machine-native settlement systems.</p>
<div class="base-url">
<span class="label">Base URL</span>
<span class="url">https://api.observerprotocol.org</span>
<span class="live-dot"></span>
</div>
<div style="margin-top:1rem;">
<a href="https://api.observerprotocol.org/docs" target="_blank" class="btn btn-outline" style="font-size:12px;">
Interactive Swagger UI ↗
</a>
</div>
</div>
</div>
<div class="container">
<div class="api-layout">
<!-- SIDEBAR -->
<aside class="api-sidebar">
<div class="sidebar-group">
<div class="sidebar-group-label">Agentic Terminal</div>
<a href="#health" class="sidebar-link"><span class="method-tag get">GET</span>/health</a>
<a href="#protocols" class="sidebar-link"><span class="method-tag get">GET</span>/protocols</a>
<a href="#metrics" class="sidebar-link"><span class="method-tag get">GET</span>/metrics</a>
<a href="#signals" class="sidebar-link"><span class="method-tag get">GET</span>/signals</a>
<a href="#stats" class="sidebar-link"><span class="method-tag get">GET</span>/stats</a>
<a href="#agent-events" class="sidebar-link"><span class="method-tag get">GET</span>/agent-events</a>
</div>
<div class="sidebar-group">
<div class="sidebar-group-label">Verified Agent Credentials</div>
<a href="#vac-get" class="sidebar-link active"><span class="method-tag get">GET</span>/vac/{agent_id}</a>
<a href="#vac-refresh" class="sidebar-link"><span class="method-tag post">POST</span>/vac/{agent_id}/refresh</a>
<a href="#vac-history" class="sidebar-link"><span class="method-tag get">GET</span>/vac/{agent_id}/history</a>
<a href="#vac-revoke" class="sidebar-link"><span class="method-tag post">POST</span>/vac/{credential_id}/revoke</a>
</div>
<div class="sidebar-group">
<div class="sidebar-group-label">Observer Protocol</div>
<a href="#register" class="sidebar-link"><span class="method-tag post">POST</span>/register-agent</a>
<a href="#verify" class="sidebar-link"><span class="method-tag post">POST</span>/verify-agent</a>
<a href="#submit" class="sidebar-link"><span class="method-tag post">POST</span>/submit-transaction</a>
<a href="#trends" class="sidebar-link"><span class="method-tag get">GET</span>/trends</a>
<a href="#feed" class="sidebar-link"><span class="method-tag get">GET</span>/feed</a>
<a href="#badge" class="sidebar-link"><span class="method-tag get">GET</span>/badge/{id}</a>
<a href="#profile" class="sidebar-link"><span class="method-tag get">GET</span>/agents/{id}</a>
</div>
</aside>
<!-- MAIN -->
<main>
<!-- AGENTIC TERMINAL GROUP -->
<div class="endpoint-section">
<div class="endpoint-section-title">Agentic Terminal</div>
<div class="endpoint" id="health">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag get">GET</span>
<span class="endpoint-path">/api/v1/health</span>
<span class="endpoint-summary">Health Check</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<p style="font-size:13px; color:var(--text-secondary); font-family:var(--font-sans); margin-bottom:1rem;">Returns current API status and network connectivity.</p>
<div class="response-label">Response 200</div>
<div class="code-block" style="font-size:12px;">
{<br>
<span class="key">"status"</span>: <span class="str">"ok"</span>,<br>
<span class="key">"network"</span>: <span class="str">"active"</span>,<br>
<span class="key">"version"</span>: <span class="str">"1.0.0"</span>,<br>
<span class="key">"timestamp"</span>: <span class="str">"2026-03-11T00:00:00Z"</span><br>
}
</div>
<a href="https://api.observerprotocol.org/api/v1/health" target="_blank" class="try-it-link">Try it ↗</a>
</div>
</div>
<div class="endpoint" id="metrics">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag get">GET</span>
<span class="endpoint-path">/api/v1/metrics</span>
<span class="endpoint-summary">Get Metrics</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<p style="font-size:13px; color:var(--text-secondary); font-family:var(--font-sans); margin-bottom:1rem;">Aggregate protocol metrics across all tracked payment rails.</p>
<a href="https://api.observerprotocol.org/api/v1/metrics" target="_blank" class="try-it-link">Try it ↗</a>
</div>
</div>
<div class="endpoint" id="stats">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag get">GET</span>
<span class="endpoint-path">/api/v1/stats</span>
<span class="endpoint-summary">Get Stats</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<p style="font-size:13px; color:var(--text-secondary); font-family:var(--font-sans); margin-bottom:1rem;">Cross-protocol aggregate statistics including transaction counts, volume buckets, and rail breakdown.</p>
<a href="https://api.observerprotocol.org/api/v1/stats" target="_blank" class="try-it-link">Try it ↗</a>
</div>
</div>
<div class="endpoint" id="agent-events">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag get">GET</span>
<span class="endpoint-path">/api/v1/agent-events</span>
<span class="endpoint-summary">Get Agent Events</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<table class="param-table">
<tr><th>Parameter</th><th>Type</th><th>Required</th><th>Description</th></tr>
<tr><td class="param-name">agent_id</td><td class="param-type">string</td><td class="param-opt">optional</td><td class="param-desc">Filter by agent public key hash</td></tr>
<tr><td class="param-name">limit</td><td class="param-type">integer</td><td class="param-opt">optional</td><td class="param-desc">Max results. Default: 50</td></tr>
<tr><td class="param-name">since</td><td class="param-type">string</td><td class="param-opt">optional</td><td class="param-desc">ISO date filter</td></tr>
</table>
<a href="https://api.observerprotocol.org/api/v1/agent-events" target="_blank" class="try-it-link">Try it ↗</a>
</div>
</div>
</div>
<!-- VERIFIED AGENT CREDENTIALS GROUP -->
<div class="endpoint-section">
<div class="endpoint-section-title">Verified Agent Credentials (VAC) · v0.3</div>
<div class="endpoint" id="vac-get">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag get">GET</span>
<span class="endpoint-path">/vac/{agent_id}</span>
<span class="endpoint-summary">Get Verified Agent Credential</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<p style="font-size:13px; color:var(--text-secondary); font-family:var(--font-sans); margin-bottom:1rem;">
Retrieve the active VAC for an agent. Returns a cryptographically-signed credential containing verified facts, partner attestations, and metadata.
VACs expire after 7 days and refresh automatically every 24 hours.
</p>
<div class="response-label">Response 200 — VAC Structure</div>
<div class="code-block" style="font-size:11px; line-height:1.7;">
{<br>
<span class="key">"version"</span>: <span class="str">"1.0.0"</span>,<br>
<span class="key">"issued_at"</span>: <span class="str">"2026-03-23T21:37:41-04:00"</span>,<br>
<span class="key">"expires_at"</span>: <span class="str">"2026-03-30T21:37:41-04:00"</span>,<br>
<span class="key">"credential_id"</span>: <span class="str">"3b43dca6-864a-44ea-b8e7-d4182e5c5e11"</span>,<br>
<span class="key">"core"</span>: {<br>
<span class="key">"agent_id"</span>: <span class="str">"maxi-0001"</span>,<br>
<span class="key">"total_transactions"</span>: <span class="val">26</span>,<br>
<span class="key">"total_volume_sats"</span>: <span class="val">1523000000</span>,<br>
<span class="key">"unique_counterparties"</span>: <span class="val">12</span>,<br>
<span class="key">"rails_used"</span>: [<span class="str">"x402"</span>, <span class="str">"L402"</span>, <span class="str">"lightning"</span>],<br>
<span class="key">"first_transaction_at"</span>: <span class="str">"2026-02-22T18:25:01-05:00"</span>,<br>
<span class="key">"last_transaction_at"</span>: <span class="str">"2026-03-19T00:01:27-04:00"</span><br>
},<br>
<span class="key">"extensions"</span>: {<br>
<span class="key">"partner_attestations"</span>: [<br>
{<br>
<span class="key">"partner_name"</span>: <span class="str">"corpo"</span>,<br>
<span class="key">"claims"</span>: { <span class="key">"legal_entity_id"</span>: <span class="str">"WYO-12345"</span> }<br>
}<br>
]<br>
},<br>
<span class="key">"signature"</span>: <span class="str">"c5f30317c2616370cf62d628797e53d55d2437d2..."</span><br>
}
</div>
<a href="https://api.observerprotocol.org/vac/maxi-0001" target="_blank" class="try-it-link">Try it ↗</a>
</div>
</div>
<div class="endpoint" id="vac-refresh">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag post">POST</span>
<span class="endpoint-path">/vac/{agent_id}/refresh</span>
<span class="endpoint-summary">Refresh VAC Credential</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<p style="font-size:13px; color:var(--text-secondary); font-family:var(--font-sans); margin-bottom:1rem;">
Force generation of a new VAC with the latest transaction data. Normally automatic every 24 hours, but can be triggered on-demand.
</p>
<div class="response-label">Response 201</div>
<div class="code-block" style="font-size:12px;">
{<br>
<span class="key">"credential_id"</span>: <span class="str">"new-uuid"</span>,<br>
<span class="key">"issued_at"</span>: <span class="str">"2026-03-23T21:45:00Z"</span>,<br>
<span class="key">"status"</span>: <span class="str">"refreshed"</span><br>
}
</div>
</div>
</div>
<div class="endpoint" id="vac-history">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag get">GET</span>
<span class="endpoint-path">/vac/{agent_id}/history</span>
<span class="endpoint-summary">Get VAC History</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<p style="font-size:13px; color:var(--text-secondary); font-family:var(--font-sans); margin-bottom:1rem;">
Retrieve historical VAC credentials for an agent. Useful for tracking reputation evolution over time.
</p>
<table class="param-table">
<tr><th>Parameter</th><th>Type</th><th>Required</th><th>Description</th></tr>
<tr><td class="param-name">limit</td><td class="param-type">integer</td><td class="param-opt">optional</td><td class="param-desc">Max results. Default: 10</td></tr>
<tr><td class="param-name">include_revoked</td><td class="param-type">boolean</td><td class="param-opt">optional</td><td class="param-desc">Include revoked credentials. Default: false</td></tr>
</table>
</div>
</div>
</div>
<!-- OBSERVER PROTOCOL GROUP -->
<div class="endpoint-section">
<div class="endpoint-section-title">Observer Protocol</div>
<div class="endpoint" id="register">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag post">POST</span>
<span class="endpoint-path">/observer/register-agent</span>
<span class="endpoint-summary">Register Agent</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<p style="font-size:13px; color:var(--text-secondary); font-family:var(--font-sans); margin-bottom:1rem;">Register a new agent identity. Returns agent_id and a time-limited challenge for cryptographic verification.</p>
<div class="response-label">Request Body</div>
<div class="code-block" style="font-size:12px;">
{<br>
<span class="key">"public_key"</span>: <span class="str">"02a1b2c3…"</span>, <span class="comment">// hex, required</span><br>
<span class="key">"alias"</span>: <span class="str">"MyAgent"</span>, <span class="comment">// optional, non-authoritative</span><br>
<span class="key">"lightning_pubkey"</span>: <span class="str">"03d4…"</span> <span class="comment">// optional</span><br>
}
</div>
<div class="response-label">Response 200</div>
<div class="code-block" style="font-size:12px;">
{<br>
<span class="key">"agent_id"</span>: <span class="str">"sha256:3f7a…"</span>,<br>
<span class="key">"challenge"</span>: <span class="str">"verify:sha256:3f7a…:1741651200"</span>,<br>
<span class="key">"badge_url"</span>: <span class="str">"https://api.observerprotocol.org/observer/badge/sha256:3f7a….svg"</span><br>
}
</div>
</div>
</div>
<div class="endpoint" id="verify">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag post">POST</span>
<span class="endpoint-path">/observer/verify-agent</span>
<span class="endpoint-summary">Verify Agent</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<p style="font-size:13px; color:var(--text-secondary); font-family:var(--font-sans); margin-bottom:1rem;">Submit signed challenge response. Full ECDSA enforcement live in v0.2. Issues API key on success.</p>
<div class="response-label">Request Body</div>
<div class="code-block" style="font-size:12px;">
{<br>
<span class="key">"agent_id"</span>: <span class="str">"sha256:3f7a…"</span>,<br>
<span class="key">"challenge"</span>: <span class="str">"verify:sha256:3f7a…:1741651200"</span>,<br>
<span class="key">"signature"</span>: <span class="str">"3045022100…"</span><br>
}
</div>
</div>
</div>
<div class="endpoint" id="submit">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag post">POST</span>
<span class="endpoint-path">/observer/submit-transaction</span>
<span class="endpoint-summary">Submit Transaction</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<p style="font-size:13px; color:var(--text-secondary); font-family:var(--font-sans); margin-bottom:1rem;">Submit a verified event with cryptographic proof. Requires API key. Rejected if proof is invalid.</p>
<table class="param-table">
<tr><th>Header</th><th>Type</th><th>Required</th><th>Description</th></tr>
<tr><td class="param-name">X-API-Key</td><td class="param-type">string</td><td class="param-req">required</td><td class="param-desc">API key from verify-agent</td></tr>
</table>
<div class="response-label">Request Body (Observer Event)</div>
<div class="code-block" style="font-size:11px; line-height:1.8;">
{<br>
<span class="key">"event_type"</span>: <span class="str">"payment.executed"</span>,<br>
<span class="key">"arp_version"</span>: <span class="str">"0.1"</span>,<br>
<span class="key">"agent_id"</span>: <span class="str">"sha256:3f7a…"</span>,<br>
<span class="key">"protocol"</span>: <span class="str">"lightning"</span>,<br>
<span class="key">"settlement_reference"</span>: <span class="str">"7f1eefd276ca…"</span>, <span class="comment">// preimage</span><br>
<span class="key">"amount_bucket"</span>: <span class="str">"small"</span>,<br>
<span class="key">"direction"</span>: <span class="str">"outbound"</span>,<br>
<span class="key">"time_window"</span>: <span class="str">"2026-03-11"</span><br>
}
</div>
</div>
</div>
<div class="endpoint" id="feed">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag get">GET</span>
<span class="endpoint-path">/observer/feed</span>
<span class="endpoint-summary">Get Public Feed</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<p style="font-size:13px; color:var(--text-secondary); font-family:var(--font-sans); margin-bottom:1rem;">Public anonymized event feed. No authentication required. Pseudonymous key hashes only — precise amounts never stored.</p>
<a href="https://api.observerprotocol.org/observer/feed" target="_blank" class="try-it-link">Try it ↗</a>
</div>
</div>
<div class="endpoint" id="badge">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag get">GET</span>
<span class="endpoint-path">/observer/badge/{agent_id}.svg</span>
<span class="endpoint-summary">Get Agent Badge</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<p style="font-size:13px; color:var(--text-secondary); font-family:var(--font-sans); margin-bottom:1rem;">Returns SVG badge reflecting current verification status. Embed in agent profiles, READMEs, or websites.</p>
<div class="response-label">Embed Example</div>
<div class="code-block" style="font-size:12px;">
<span class="op"><</span><span class="key">img</span> <span class="val">src</span>=<span class="str">"https://api.observerprotocol.org/observer/badge/{agent_id}.svg"</span> <span class="val">alt</span>=<span class="str">"Verified Agent"</span> <span class="op">/></span>
</div>
</div>
</div>
<div class="endpoint" id="profile">
<div class="endpoint-header" onclick="toggle(this)">
<span class="method-tag get">GET</span>
<span class="endpoint-path">/observer/agents/{agent_id}</span>
<span class="endpoint-summary">Get Agent Profile</span>
<span class="endpoint-toggle">▶</span>
</div>
<div class="endpoint-body">
<p style="font-size:13px; color:var(--text-secondary); font-family:var(--font-sans); margin-bottom:1rem;">Public agent profile including verification status, transaction count, success rate, and badge level.</p>
<a href="https://api.observerprotocol.org/observer/agents/sha256:3f7a" target="_blank" class="try-it-link">Try it ↗</a>
</div>
</div>
</div>
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