← The evidence ledger
Evidence row 23764
Observed , by baseline/1.
- Kind
- listing
- About
- source_record mcp_registry:engineer.calc/calc
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 0c749f8dca4ac54e19d67b4f33fbd119b1158c8cef27af177d84faa09767ba87
- Leaf
- 0x1cd8620522d88c2e0a55a6daa6e21a1978d79ee93f2cda5a28c96219586c93f8
What was observed
{
"endpoints": [
[
"mcp",
"https://calc.engineer/mcp"
],
[
"web",
"https://calc.engineer/"
]
],
"name": "calc.engineer",
"owner_address": null,
"raw": {
"_meta": {
"io.modelcontextprotocol.registry/official": {
"isLatest": true,
"publishedAt": "2026-07-18T02:24:02.263675Z",
"status": "active",
"statusChangedAt": "2026-07-18T02:24:02.263675Z",
"updatedAt": "2026-07-18T02:24:02.263675Z"
}
},
"server": {
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"description": "88 free engineering calculators: RF link budgets, LoRa/Meshtastic, PCB, solar, homelab. Keyless.",
"name": "engineer.calc/calc",
"remotes": [
{
"type": "streamable-http",
"url": "https://calc.engineer/mcp"
}
],
"title": "calc.engineer",
"version": "1.0.0",
"websiteUrl": "https://calc.engineer"
}
},
"source": "mcp_registry",
"summary": "88 free engineering calculators: RF link budgets, LoRa/Meshtastic, PCB, solar, homelab. Keyless."
}What the leaf hashes
{"body":"0c749f8dca4ac54e19d67b4f33fbd119b1158c8cef27af177d84faa09767ba87","id":23764,"kind":"listing","method":"baseline/1","observed_us":1793025351467047,"prev":null,"subject":"mcp_registry:engineer.calc/calc","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x1cd86140228518138758b78d230924dc18e29349523cf19cb629e60c6cfb2b27
- 0x8b3ce212293932d23b537a3c953738393cce1c59e8078f8ba7fbd16a32693a3a
- 0xd7dd06e3bd0aaec9b59e8a8035d56df5116c7fe6955cc66cd3b59202441f5450
- 0x4c2cbfe10280dfc7b080ed40e98d628998e32bef00a29104147e9f4947f12751
- 0xc523a0da9fd0e2f29b9c5132a0860419631a40cf8b370ef747e900d26e1c3eb5
- 0xe2df0cd47dcf68dda20cbe3807becfba1280e05e52cac7dd9152dada57e1d394
- 0x544d23d616e6961b5161827465ab45f99fc13a4726b00de56c5a7f7afa3989d3
- 0xaf08166d75382169d569b172eba5d35caf44c37dc6f36e56f05c1c25ba07539c
- 0x9c2e93f52fb8e1c57d02c532a526a8645e36a2715dcb3ef272d07b99ae21dc12
- 0x913900416f7046fb32d071616f60d33caf9d9e72606fee360a2d8e16507ccace
- 0x15110e1ab8fe267895da4a2cf012c17f5824a8afca5d2dac1f158d633e16c91c
- 0x8e3531af6dd328ff9a174dd19751228f67fa0773c68a89edf859dffbd7b098c3
- 0x42b0d9d5b53af5b0fe99cee10ce29fe484db78b92ce49f97190cc6d098651d47
- 0x9dfd312f3d4937f7cb144cee3987e8516f222932b4ea286605236d73cfa1ed16
- 0xc3a6a3ae44ec0da1848b16d40c45d7aac97a67352eea8df18e0f26edabea8a2f
- 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
- 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae