Evidence row 12345

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://a2awire.com/mcp/data/devtowatch-dev-to-developer-blog-tutorial-firehose-11f3ce/http"
    ],
    [
      "web",
      "https://a2awire.com/data/devtowatch-dev-to-developer-blog-tutorial-firehose-11f3ce"
    ]
  ],
  "name": "dev.to Developer Blogs & Programming Tutorials — buy per-query (devtowatch)",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-09-10T18:31:17.846313Z",
        "status": "active",
        "statusChangedAt": "2026-09-10T18:31:17.846313Z",
        "updatedAt": "2026-09-10T18:31:17.846313Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "_meta": {
        "io.modelcontextprotocol.registry/publisher-provided": {
          "cadence": "Hourly refresh; republished when new dev.to posts land (continuous churn, feed window minutes-fresh)",
          "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/devtowatch-dev-to-developer-blog-tutorial-firehose-11f3ce",
          "mcp_remote": "https://a2awire.com/mcp/data/devtowatch-dev-to-developer-blog-tutorial-firehose-11f3ce/http",
          "price": "$0.01/query. Free testnet USDC via in-session faucet.",
          "product": "Live feed of new dev.to community articles — the largest open developer-blogging platform. Each row carries the canonical post URL, title, publish time, tags and an excerpt. Buckets: newest posts (full 12-item feed window), tutorial-matched slice (guides/intros/beginner content b",
          "sample_queries": [
            "What are the newest developer blog posts on dev.to?",
            "Show recent programming tutorials or beginner guides",
            "What tags are trending in the latest dev.to window?"
          ],
          "search_keywords": [
            "developer-blog",
            "programming-tutorial",
            "tutorial-community",
            "devto",
            "developer-community"
          ],
          "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": "dev.to developer blog & tutorial feed. $0.01/query. Register in-session — free testnet funds.",
      "name": "com.a2awire/data-developer-blog-programming-tutorial-community",
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://a2awire.com/mcp/data/devtowatch-dev-to-developer-blog-tutorial-firehose-11f3ce/http"
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/ee324/a2awire"
      },
      "title": "dev.to Developer Blogs & Programming Tutorials — buy per-query (devtowatch)",
      "version": "0.1.0",
      "websiteUrl": "https://a2awire.com/data/devtowatch-dev-to-developer-blog-tutorial-firehose-11f3ce"
    }
  },
  "source": "mcp_registry",
  "summary": "dev.to developer blog & tutorial feed. $0.01/query. Register in-session — free testnet funds."
}

What the leaf hashes

{"body":"6b4cdeabb71a7e6f9f10c3a16ed88ac92e96b4e64bdea474fb33d590220d2fea","id":12345,"kind":"listing","method":"baseline/1","observed_us":1793025305210503,"prev":null,"subject":"mcp_registry:com.a2awire/data-developer-blog-programming-tutorial-community","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. 0x2b2806edace868a0c8752483e1e8d24cb5047d6a20fc4b24e21d5ec1d34df896
2. 0xc4440a8fc7a42892add90a9c4fad8dfe877ddbd8b9e9d51e24768cf6de9c058b
3. 0x62e7a18fcd55d58ea212f4921a72f79db7e08c05b4ebd3b1c6ff1d6f98ac515b
4. 0xc53cc9e188f66a69d3339b3da3ccf9e92def5a37de879dee8f30961bebdf9c87
5. 0x05f932361daae60cb45dd4eb96700f0ad470cb5ba2b43368bdb4db752a0a6220
6. 0xb500099ed07f8800ac82e5ea0f9c799be23793e09f615f00be8d70d4dc92057d
7. 0xf0e73b602802d1a8fb834adc6b96ab27a9f6ca96adc3fe8e5510c0bcf3cb9908
8. 0x1dc1419dc6e9579f7eb447ca693d64b843280e6c4630469e40eef9d28c8ac99c
9. 0x33aee3f1b00299058740ab3a933e5972ee5f5272ffa5367aa267a83a44833793
10. 0xaa8650f76913e91404db3fdf03026f9761609152eb2e32f71c4d93058b86b406
11. 0xde76827525517f5c8aef4ffd7831eab09ee63757dcc2282bc64307fd6ee67ad1
12. 0xe8bf822fd6c66b233e3e13e08596e8fb41c1ed9b85be0e4d50cfc9b740c0e206
13. 0xb87e8b32cda179c9e632e227bbd8a6d1f6f61d9d81bb92dbd4dd835d2b3b5caa
14. 0x683955a5b2250ad50568d022a6580d8739b6aff1356779d72a773b088e7c289c
15. 0x610738e0c43687aded83c613c73de8b5226c73c375858a167436461c522ea213
16. 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae