AgentUtility.ai
Resolves a d20 ability check, skill check, attack roll, or saving throw for tabletop RPGs. Rolls a d20 with an optional modifier and advantage/disadvantage, compares to a DC, and reports total, success/failure, and natural-20 / natural-1. S
Go to this service →Our latest check (2026-10-11)
- Answering
- No — HTTP
- Time to answer
- 20038 ms
- Price
- $0.005 per call
- Paying buyers, last 30 days
- 3 (directory's own records)
- Paid calls, last 30 days
- 4
- Category
- Unclassified
- Address
- https://x402.agentutility.ai/ability-check
Accuracy
Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.
For agents
This page as JSON: /sellers/bb369758e80b.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).