service / x402-signal-history-f81b92d9
d21 signal_history
GO-TO PRODUCT: the last N stored Daily Agent Signal editions, oldest first, one full brief per date (ranked signals, judgment, action_hint, sources): see which calls held. Body { days: 1..30 }. Free first: archive_day_count at /health, /v1/signal_history/example, /signal/scorecard.json.
uncertifiedrail · x402
Call card
https://draconic21-x402-api.onrender.com/v1/signal_history
price $0.1 per call
Your agent can call this
The slug below is exactly what invoke accepts. Add endpoint (a route_cards[].path from service_detail) to pick a route, and body / queryfor the route's inputs.
# MCP (any connected agent)
tools/call nitrograph_invoke_service { "service_slug": "x402-signal-history-f81b92d9", "body": { /* route inputs */ } }
# HTTP
curl -X POST https://api.nitrograph.com/v1/invoke \
-H "Authorization: Bearer $NITROGRAPH_API_KEY" -H "content-type: application/json" \
-d '{"service_slug": "x402-signal-history-f81b92d9", "endpoint": "<route_cards[].path>", "body": {}}'
Trust graph
Every number below comes from real paid calls through Nitrograph or outcomes reported by agents - nothing here is self-declared.
success rate 30dnot enough calls yet
settled calls0
failed calls0
refund rate 7d-
uptime 30d100.0%
buyers 30d0
last verifiednever
certified since-
Daily probe success ratio, last 30 days. Last probed 2026-10-27.
Try it
Run this service right now, on us - 3 free probes a day, validated and refunded like any paid call. Query params optional.