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Quick summary: To integrate Technical Analyst with OpenClaw, register a skill in ClawHub that points to a secure webhook or adapter you host, implement an invocation handler that authenticates and validates OpenClaw requests, perform any required OAuth/API-key exchanges against the Technical Analyst API from that adapter, store credentials in environment variables or a secrets store, keep stateful or long-running work outside the agent runtime, and add observability + retry logic so failures are diagnosable. Do the explicit configuration and authentication steps in ClawHub and the third-party API (scopes, redirect URIs, secrets) before calling anything.
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// Simple Express app that receives invocations from OpenClaw (via ClawHub).
// It validates a shared secret HMAC and proxies to the Technical Analyst API.
const express = require('express');
const crypto = require('crypto');
const fetch = require('node-fetch');
const app = express();
app.use(express.json());
const SHARED_SECRET = process.env.CLAWHUB_WEBHOOK_SECRET;
const TA_API_BASE = process.env.TA_API_BASE;
const TA_API_KEY = process.env.TA_API_KEY; // Or use OAuth token in production
function verifySignature(req) {
const sig = req.header('x-claw-signature'); // <b>//</b> exact header name is configurable in ClawHub
if (!sig) return false;
const payload = JSON.stringify(req.body);
const h = crypto.createHmac('sha256', SHARED_SECRET).update(payload).digest('hex');
return crypto.timingSafeEqual(Buffer.from(h), Buffer.from(sig));
}
app.post('/webhook/invoke', async (req, res) => {
if (!verifySignature(req)) {
return res.status(401).json({ error: 'invalid signature' });
}
const invocation = req.body; // <b>//</b> examine ClawHub docs for actual invocation fields
const input = invocation.input || '';
try {
// <b>//</b> Call Technical Analyst API — adapt path and auth as required by the vendor
const taResp = await fetch(`${TA_API_BASE}/analyze`, {
method: 'POST',
headers: {
'Authorization': `Bearer ${TA_API_KEY}`,
'Content-Type': 'application/json'
},
body: JSON.stringify({ query: input })
});
if (!taResp.ok) {
const text = await taResp.text();
console.error('Technical Analyst error', taResp.status, text);
return res.status(502).json({ error: 'upstream error', details: text });
}
const taResult = await taResp.json();
// <b>//</b> Map TA response to the shape OpenClaw expects and return it
return res.json({ result: taResult });
} catch (err) {
console.error('integration failure', err);
return res.status(500).json({ error: 'internal error' });
}
});
const port = process.env.PORT || 3000;
app.listen(port, () => console.log(`Adapter listening on ${port}`));
// <b>//</b> Generic exchange to turn an authorization code into an access token.
// Replace authEndpoint and tokenEndpoint with those from the Technical Analyst docs.
const fetch = require('node-fetch');
async function exchangeCodeForToken(code) {
const tokenEndpoint = process.env.TA_TOKEN_ENDPOINT;
const clientId = process.env.TA_CLIENT_ID;
const clientSecret = process.env.TA_CLIENT_SECRET;
const redirectUri = process.env.TA_REDIRECT_URI;
const params = new URLSearchParams();
params.append('grant_type', 'authorization_code');
params.append('code', code);
params.append('redirect_uri', redirectUri);
params.append('client_id', clientId);
params.append('client_secret', clientSecret);
const resp = await fetch(tokenEndpoint, {
method: 'POST',
headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
body: params.toString()
});
if (!resp.ok) {
const text = await resp.text();
throw new Error('token exchange failed: ' + text);
}
return await resp.json(); // <b>//</b> typically contains access_token, refresh_token, expires_in
}
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1
A 401 means the Technical Analyst service rejected the API key. Most often this is caused by a wrong key value, wrong header format/prefix, using the wrong environment (staging vs prod), or the skill/permission not pointing at the configured credential. Verify the key, header, and skill configuration immediately.
Do these checks in order and inspect OpenClaw skill logs and the service’s auth error body.
// fetch example: adapt prefix per provider docs
fetch('https://api.technical-analyst.example/v1/endpoint', {
method: 'GET',
headers: {
'Authorization': `Bearer ${process.env.TECH_ANALYST_API_KEY}`,
'Content-Type': 'application/json'
}
})
2
OpenClaw ingest rejects Technical Analyst events when the event payload doesn't match the expected schema (wrong or missing schema_version, wrong field types/names, or envelope shape) or when the JSON is malformed/Content-Type is wrong. Fix by validating the event structure against the expected schema_version, sending the correct headers, and checking logs for parser errors.
Steps to resolve:
// Example: POST an event with correct schema_version
fetch("https://your-ingest-endpoint/ingest", {
method: "POST",
headers: { "Content-Type": "application/json", "Authorization": "Bearer TOKEN" },
body: JSON.stringify({
schema_version: "1.0",
event_type: "technical_analyst",
id: "evt_123",
timestamp: new Date().toISOString(),
payload: { /* ... */ }
})
});
3
The error means the OpenClaw agent/runtime does not trust the gRPC server certificate (a self‑signed cert or missing CA). Fix by providing a trusted CA to the agent runtime or replacing the server cert with one signed by a CA already trusted by the environment; do not disable verification in production.
What to check
4
Direct answer: Unknown-field or unmarshalling errors happen when the Technical Analyst’s expected JSON/typed schema and the OpenClaw SDK (or agent runtime) disagree — typically because the SDK/client or the analyst service was updated without regenerating or aligning the contract. Fix by aligning versions, regenerating clients/models from the canonical API schema, and using tolerant deserializers while you migrate.
Example (Jackson)
// configure once ObjectMapper m = new ObjectMapper(); m.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
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