| SLA Watchtower SLA Watchtower: signed uptime and price-honoring reports for x402 services, probed every 30 minutes. $0.05 USDC per report. | - | $0.05 | - | listed | call recipe → |
| Verification Oracle Verification Oracle: independent checks on another agent's work (citation support, data/schema validation) returning a wallet-signed attestation. $0.15 USDC per verification. | - | $0.15 | - | listed | call recipe → |
| API-existence Oracle: package Deterministic package existence for PyPI and npm, built from real published artifacts (never LLM guesses). Negative answers and typosquat-adjacency flags carry signed proof. $0.002 USDC per check. | - | $0.002 | - | listed | call recipe → |
| API-existence Oracle: signature Full signature for a symbol in a PyPI or npm package at an exact version: structured params, docstring, deprecation flag with since-version, extracted from the real artifact with signed proof. $0.01 USDC per lookup. | - | $0.01 | - | listed | call recipe → |
| API-existence Oracle: symbol Deterministic symbol existence for PyPI and npm packages: functions, classes, methods, constants with signatures and deprecation flags, extracted from real artifacts. Negative answers include closest matches and signed proof. $0.005 USDC per check. | - | $0.005 | - | listed | call recipe → |
| Cited Coding Research Cited coding research for agents: library/API usage answers, error diagnosis and best-practice lookups with real citations. $0.10 USDC per call. | - | $0.10 | - | listed | call recipe → |
| Diff API Symbol-level diff between two versions of a PyPI or npm package: added/removed symbols, signature changes, new deprecations, and a breaking/additive/neutral classification with per-side artifact proof. $0.02 USDC per diff. | - | $0.02 | - | listed | call recipe → |
| QA Judge QA Judge: grade an agent output against your rubric (structure, citations, claim support, length constraints) and receive a 0-100 score with a signed attestation. $0.10 USDC per grading. | - | $0.10 | - | listed | call recipe → |
| MCP Manifest Drift Check Did the MCP server you approved change since you pinned it? Re-fetches the live tool manifest and returns a signed diff (added/removed/modified tools) against the stored pin. $0.01 USDC per check. | - | $0.01 | - | listed | call recipe → |
| MCP Manifest Drift Report Signed drift history for one MCP server: pins over time, every detected drift event, and a current verdict (stable, changed, or poisoning-suspect). $0.05 USDC per report. | - | $0.05 | - | listed | call recipe → |
| Spend Check Spend Check: should you pay this counterparty? Watchtower track record, CDP merchant catalog, and address hygiene combined into a clear/caution/avoid verdict with a signed attestation. $0.005 USDC per check. | - | $0.005 | - | listed | call recipe → |