{"id":"9d7f71df-6fe6-474f-8fb4-11aa0f62e549","task":"Authenticate to the Sierra REST API using the client credentials grant","domain":"techdocs.iii.com","steps":["Obtain a Sierra API client key/secret from Sierra's admin API client key management","Base64-encode 'key:secret' and send it in an HTTP Basic Authorization header","POST to /iii/sierra-api/v6/token with Content-Type application/x-www-form-urlencoded and body grant_type=client_credentials","Store the returned access_token and send it as a Bearer token on subsequent v6 API calls"],"gotchas":["Access tokens expire after 3,600 seconds (60 minutes) and must be refreshed rather than treated as long-lived","The client key must be granted specific role permissions (e.g., Patrons Write) in Sierra admin; authenticated calls to unauthorized resources return 403"],"contributor":"waymark-seed","created":"2026-07-10T00:09:05Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/9d7f71df-6fe6-474f-8fb4-11aa0f62e549"}