Evidence row 422711

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://api.echo-mem.com/mcp"
    ],
    [
      "web",
      "https://echo-mem.com/"
    ]
  ],
  "name": "Echo Memory",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-27T07:00:53.53174Z",
        "status": "active",
        "statusChangedAt": "2026-10-27T07:00:53.53174Z",
        "updatedAt": "2026-10-27T07:00:53.53174Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Shared memory for AI agents, as a graph in your own Postgres. Writes never call an LLM.",
      "name": "com.echo-mem/echo-mem",
      "packages": [
        {
          "environmentVariables": [
            {
              "description": "Postgres connection string. `echo-memory quickstart` starts a suitable database and prints this.",
              "isRequired": true,
              "isSecret": true,
              "name": "ECHO_MEMORY_DATABASE_URL"
            },
            {
              "description": "Whose memory this is. Scopes every read and write.",
              "isRequired": true,
              "name": "ECHO_MEMORY_USER_ID"
            },
            {
              "description": "Which tool is writing: claude-code, cursor, codex, claude-desktop. Recorded on every fact, and what makes a cross-tool recall visible afterwards.",
              "isRequired": true,
              "name": "ECHO_MEMORY_AGENT_ID"
            }
          ],
          "identifier": "echo-mem",
          "registryType": "pypi",
          "transport": {
            "type": "stdio"
          },
          "version": "0.5.6"
        }
      ],
      "remotes": [
        {
          "headers": [
            {
              "description": "Bearer <key>, from https://app.echo-mem.com — the hosted option, which needs no local database.",
              "isRequired": true,
              "isSecret": true,
              "name": "Authorization"
            }
          ],
          "type": "streamable-http",
          "url": "https://api.echo-mem.com/mcp"
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/echo-mem/echo-mem"
      },
      "title": "Echo Memory",
      "version": "0.5.6",
      "websiteUrl": "https://echo-mem.com"
    }
  },
  "source": "mcp_registry",
  "summary": "Shared memory for AI agents, as a graph in your own Postgres. Writes never call an LLM."
}

What the leaf hashes

{"body":"938493ef008e534f5ecce8771e9c0ce75e8d0699c48ea0010efc0eca10f2a449","id":422711,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793084646439613,"prev":null,"subject":"mcp_registry:com.echo-mem/echo-mem","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0xa1922d79b9eb80c7111a67f8c67ff56e49602a908649ff2ed904330ba7141e51
2. 0x647ddda41a83de0d31039c80da27569de9216f338a30153f15d00909dfd9ada3
3. 0xcc651baa33778435083878a454f3cbc7c0f739dc2dcb67463d10a0ff5da2419d
4. 0xb1235d5791b3d2254c34847d09fa51b085c0ab4b92250ce661a8f52414b92e33
5. 0x5ce4d7fb58ac5f999343309bf23fbedb4727f3ddb40d191274334bd384a4d758
6. 0x1086d23bcf4d82f9fa1299c6175ab357ad329fef0bf62b2fbdc67d7214685668
7. 0x2b83e84bcb5537a459478dd8f37f42a26b6deb2dec65b27c8b16a9ff896cef01
8. 0x066b51164223801acc895923b6c198e57c7e379c42d32fbc10f75479d7d4a1c8
9. 0xa52299123815b10206d0a150f87bb0ad3a93d4bb71c4520f863f78b384a474e5
10. 0x840b5a16bd7a76688b3438648ba34815258d06804d46c9a73dac456232723787
11. 0xaebaba8ad2f82e80733f15f1c72bf9939ef7e72f5eb00451b55d7db696f36fd0
12. 0x33950e20188f67e0f2148f6d7f32c815ddcf437f8b5b049a9de944b90cf78cd0
13. 0xa91c23113464e2fc1e93d41e407b7c6c254bee2eac2f7a550e2f9a1275eef26a
14. 0xb37e6165108af3c1962db6b76953aee5ee86201747a07444ad2760bf2d5dca23
15. 0xa3fff4662cd48659f5bafd0612931759a90e53a7b4209ed8f26f6594a07bb547
16. 0x64c405a28e8819716221eb2529fe4ce277ab08025e17e685cbd5ece75ceb75c7
17. 0xf30fddbf4811226c58e8f0daf36fddd79fc5f1356b592bb1d99a8061ddbabe66
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4