Evidence row 12377

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://a2awire.com/mcp/data/quantawatch-quanta-magazine-deep-science-math-physics-journalism-b7a50a/http"
    ],
    [
      "web",
      "https://a2awire.com/data/quantawatch-quanta-magazine-deep-science-math-physics-journalism-b7a50a"
    ]
  ],
  "name": "Quanta Magazine Deep Science & Math News — buy per-query in-session (quantawatch)",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-09-21T12:07:47.404004Z",
        "status": "active",
        "statusChangedAt": "2026-09-21T12:07:47.404004Z",
        "updatedAt": "2026-09-21T12:07:47.404004Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "_meta": {
        "io.modelcontextprotocol.registry/publisher-provided": {
          "cadence": "Hourly collection; new Quanta Magazine articles appear a few times per week (multi-day gaps are normal for this source)",
          "getting_started": [
            "connect (no key needed) — initialize returns buyer-first instructions",
            "register — mints your agent identity + wallet in this session, no signup",
            "request_testnet_usdc — faucet drips free funds to your wallet",
            "data_session_open — open a prepaid $0.01/query session",
            "data_session_query — ask; attested hits returned"
          ],
          "how_to_buy": "register -> request_testnet_usdc -> data_session_open -> data_session_funding_package -> broadcast -> data_session_attach_escrow -> data_session_query",
          "listing_page": "https://a2awire.com/data/quantawatch-quanta-magazine-deep-science-math-physics-journalism-b7a50a",
          "mcp_remote": "https://a2awire.com/mcp/data/quantawatch-quanta-magazine-deep-science-math-physics-journalism-b7a50a/http",
          "price": "$0.01/query. Free testnet USDC via in-session faucet.",
          "product": "Tracks new articles from Quanta Magazine, the leading publication for deep explanatory science journalism covering mathematics, theoretical physics, biology and computer science. Each row carries the canonical article URL, publication date, section category, author and a clean ex",
          "sample_queries": [
            "What has Quanta Magazine published lately?",
            "Latest Quanta articles on mathematics and physics",
            "Summarize the newest Quanta Magazine science coverage"
          ],
          "search_keywords": [
            "quanta-magazine",
            "math-news",
            "deep-science",
            "quantamagazine",
            "science-journalism",
            "mathematics"
          ],
          "settlement": "escrow-backed on Base L2; funds never custodied by the platform",
          "verification": "on-chain corpus-root anchor evidence via /api/v1/anchors/{tx_hash}"
        }
      },
      "description": "Quanta Magazine deep-science articles. $0.01/query. Register in-session — free testnet funds.",
      "name": "com.a2awire/data-quanta-magazine-math-news-deep-science",
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://a2awire.com/mcp/data/quantawatch-quanta-magazine-deep-science-math-physics-journalism-b7a50a/http"
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/ee324/a2awire"
      },
      "title": "Quanta Magazine Deep Science & Math News — buy per-query in-session (quantawatch)",
      "version": "0.1.0",
      "websiteUrl": "https://a2awire.com/data/quantawatch-quanta-magazine-deep-science-math-physics-journalism-b7a50a"
    }
  },
  "source": "mcp_registry",
  "summary": "Quanta Magazine deep-science articles. $0.01/query. Register in-session — free testnet funds."
}

What the leaf hashes

{"body":"1c0cb31ff1b26ff0a5138ecb2e3360ae1ed8e82e60b8502ef6d6632180b5e79d","id":12377,"kind":"listing","method":"baseline/1","observed_us":1793025305249213,"prev":null,"subject":"mcp_registry:com.a2awire/data-quanta-magazine-math-news-deep-science","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0x528e3a0d4bc95e6594a005bf170d63c000600a1191b241703503956f73bab611
2. 0x894942315c30fd357e60f444d25983b0efebcf8c55869deb4b245121ef8576c7
3. 0xfec66c2706dbd48fbd3852fecf7efe3f3d66b717443bdd981878d7d0ef3faf49
4. 0x58afe942db7f008373d4a5054bee2e255b8ceddbcae5de6557e3eb36f9ec2034
5. 0x3a8c72320ae3682ca00d12c9b6f8d12635641d8d23dc01f9db6569d0ac32b9d9
6. 0xdb7373feffca2025fcdf3aa0e12bed9b9d6da4e70d1afd31124471874fa0d1c7
7. 0x88e6ba47118ea077fd1b6791b8f224e529532f84e53d51dc1b7415d23a2d297e
8. 0x21c0ed66740821ddb62ccbe39bcaaa4277ae22f7eeb46b1328288a3320b8a536
9. 0x3607751c77b1cabe074486d0fd53659a0e321fb7a8fd3bf133eaa6801af9c112
10. 0xb8b1a249955b6487f765c3f074e474715f38edf3720c5c3ca9427be80aba6ea5
11. 0x11ae5fc5d08fb7b25beace35e67656980e21edfc94e809110b5b9ecae306b6c8
12. 0x94dd4ed7cf198df741ccda83eacc422aadb31119fc6e84c4a6d2f023453b7960
13. 0xd830c52e1e8095e014510110592485afcb02b9c9a36f85653e4891a8de941246
14. 0x0733993143f0230e79482cef2c38e95d98f9eafbe64a43cdc74a4545938a4167
15. 0x2be1e80e065dd6b2cc75a7142be22225acd144ac975d70bf24b4f01fd76dc497
16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae