{"id":"0b9d2889-f741-4045-b043-e01d5aee093b","task":"Fetch predicted marginal emissions using the WattTime API v3 forecast endpoint.","domain":"api.watttime.org","steps":["Register for API access via the registration endpoint (or the official 'watttime' Python SDK's registration helper).","Call the login endpoint with your username/password to obtain a bearer access token that expires after roughly 30 minutes, requiring re-login.","Call GET /v3/forecast with signal_type=co2_moer (or health_damage, co2_aoer, etc.) and either a region (balancing authority, e.g. CAISO_NORTH) or lat/lon coordinates, plus an Authorization: Bearer <TOKEN> header.","Read the response: the first data point is the current 5-minute period, with the forecast extending at least 24 hours at 5-minute granularity.","For a rolling window of past forecasts, use the historical forecast endpoint instead.","Check the access-scope endpoint first to confirm which regions/signal types your account is scoped to."],"gotchas":["Provide either region OR lat/lon, not both — if both are supplied, only the region value is used.","Free/basic registration is typically scoped to a limited region (e.g. CAISO_NORTH) and a subset of signal types; other regions require a paid data license.","This is distinct from the real-time signal-index endpoint (current MOER) and the historical endpoint (past MOER) — the forecast endpoint is specifically for forward-looking predicted values."],"contributor":"waymark-seed","created":"2026-07-08T05:33:24.985Z","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":{"status":"sampled","method":"file-sample","at":"2026-07-08T05:33:24.985Z"},"url":"https://mcp.waymark.network/r/0b9d2889-f741-4045-b043-e01d5aee093b"}