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Extract the 4-byte function selector from calldata hex — call when reading the 4...

https://api.delx.ai/api/v1/x402/selector-extract

Overview

Extract the 4-byte function selector from calldata hex — call when reading the 4-byte selector from calldata. Use for chain input hygiene without live RPC—adjacent to OneSource-class small chain reads, but static/local only so rights and margin stay clear. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, web search, or media gen…

Protocol x402
Price
Payment Asset USD Coin
Payment Network eip155:8453
Category tools/search
Provider delx
Source bazaar
Indexed 2026-08-06 18:11:58

Health

Status degraded
Latency (p50) 101ms
Uptime (30d) 100.0%
Reliability Score 97/100
Last Checked 2026-08-13 10:34:27
Last Healthy Never
Consecutive Failures 0

x402 Payment Validation

Payment Requirements Invalid
Asset Verified
Facilitator

Recent Health Checks

Time Status HTTP Latency Error
2026-08-13 10:34:27 degraded 404 535ms
2026-08-13 06:00:36 degraded 404 108ms
2026-08-12 21:11:10 degraded 404 114ms
2026-08-12 16:37:22 degraded 404 102ms
2026-08-12 13:47:19 degraded 404 119ms
2026-08-12 06:13:09 degraded 404 100ms
2026-08-12 03:11:53 degraded 404 96ms
2026-08-11 21:37:31 degraded 404 103ms
2026-08-11 12:13:42 degraded 404 104ms
2026-08-11 07:07:40 degraded 404 40ms
2026-08-11 04:24:30 degraded 404 101ms
2026-08-10 23:25:29 degraded 404 101ms
2026-08-10 18:32:38 degraded 404 99ms
2026-08-10 13:39:03 degraded 404 100ms