{
 "generated": "2026-09-18",
 "provider": {
  "name": "Sourcify 4byte (openchain.xyz signature API successor)",
  "slug": "sourcify-4byte",
  "category": "data_apis",
  "category_label": "Data & indexing",
  "url": "https://4byte.sourcify.dev/",
  "pricing_url": "https://4byte.sourcify.dev/",
  "capabilities": [
   "api.contract",
   "function signature lookup",
   "event signature lookup",
   "error signature lookup",
   "openchain.xyz-compatible api"
  ],
  "chains_note": "Chain-agnostic, built from Sourcify's verified-contract corpus, so coverage tracks the EVM chains Sourcify verifies rather than any single chain.",
  "chain_families": [
   "evm"
  ],
  "network_support": {
   "families": [
    "evm"
   ],
   "claims": [
    {
     "target": {
      "kind": "family",
      "id": "evm"
     },
     "status": "supported",
     "evidence": {
      "text": "Chain-agnostic, built from Sourcify's verified-contract corpus, so coverage tracks the EVM chains Sourcify verifies rather than any single chain.",
      "source_refs": [],
      "verified": true,
      "last_verified": "2026-09-18"
     }
    },
    {
     "target": {
      "kind": "network",
      "id": "avalanche-c-chain",
      "name": "Avalanche C-Chain",
      "family": "evm",
      "chain_id": 43114
     },
     "status": "supported",
     "evidence": {
      "text": "Applies to Avalanche C-Chain wherever Sourcify has verified contracts there; the database maps signatures, not chain state.",
      "source_refs": [],
      "verified": true,
      "last_verified": "2026-09-18"
     }
    }
   ],
   "raw": {
    "chains_note": "Chain-agnostic, built from Sourcify's verified-contract corpus, so coverage tracks the EVM chains Sourcify verifies rather than any single chain.",
    "avalanche_support": "Applies to Avalanche C-Chain wherever Sourcify has verified contracts there; the database maps signatures, not chain state."
   }
  },
  "capability_classes": [],
  "capability_support": [
   {
    "raw": "api.contract",
    "class_ids": [],
    "status": "reported",
    "scope": "provider",
    "source_refs": [],
    "verified": true,
    "last_verified": "2026-09-18"
   },
   {
    "raw": "function signature lookup",
    "class_ids": [],
    "status": "reported",
    "scope": "provider",
    "source_refs": [],
    "verified": true,
    "last_verified": "2026-09-18"
   },
   {
    "raw": "event signature lookup",
    "class_ids": [],
    "status": "reported",
    "scope": "provider",
    "source_refs": [],
    "verified": true,
    "last_verified": "2026-09-18"
   },
   {
    "raw": "error signature lookup",
    "class_ids": [],
    "status": "reported",
    "scope": "provider",
    "source_refs": [],
    "verified": true,
    "last_verified": "2026-09-18"
   },
   {
    "raw": "openchain.xyz-compatible api",
    "class_ids": [],
    "status": "reported",
    "scope": "provider",
    "source_refs": [],
    "verified": true,
    "last_verified": "2026-09-18"
   }
  ],
  "freshness": {
   "band": "fresh",
   "age_days": 0,
   "last_verified": "2026-09-18",
   "as_of": "2026-09-18"
  },
  "status": "active",
  "promo_state": "none",
  "avalanche_support": "Applies to Avalanche C-Chain wherever Sourcify has verified contracts there; the database maps signatures, not chain state.",
  "avalanche_flag": "c-chain",
  "access_model_raw": "key-free-public",
  "access_model": "key-free-public",
  "free_tier": "Key-free with no quota published. 9,340,765 total signatures as of the site's stats refresh: 4,102,225 function, 906,923 event and 346,812 error signatures found in verified-contract ABIs, plus 3,996,703 public submissions.",
  "rate_limit": "Not published.",
  "paid_from": "No paid tier.",
  "pricing_unit": "n/a (free, no billing)",
  "promos": null,
  "notes": "[2026-09-18] Added. https://openchain.xyz/signatures now redirects to https://4byte.sourcify.dev/: the openchain signature database has been taken over by Sourcify, rebuilt from verified-contract ABIs, and kept on the openchain.xyz API shape, so existing openchain API callers should keep working against the new host. Error-signature coverage (346,812) is a capability 4byte.directory does not offer, and total coverage is roughly 6.4x larger. The page's stats were last refreshed 2026-07-05, so counts lag. Directly relevant to the contract-verification focus area.",
  "sources": [
   "https://4byte.sourcify.dev/",
   "https://openchain.xyz/signatures"
  ],
  "verified": true,
  "last_verified": "2026-09-18",
  "page": "/providers/sourcify-4byte.html"
 },
 "changes": [
  {
   "date": "2026-09-18",
   "provider": "Sourcify 4byte (openchain.xyz signature API successor)",
   "type": "new-service",
   "title": "Sourcify 4byte (openchain.xyz signature API successor) added to the tracker (data_apis)",
   "summary": "Newly tracked provider. Free tier: Key-free with no quota published. 9,340,765 total signatures as of the site's stats refresh: 4,102,225 function, 906,923 event and 346,812 error signatures found in verified-contract ABIs, plus 3,996,703 public submissions. Rate limit: Not published. Paid from: No paid tier.",
   "sources": [
    "https://4byte.sourcify.dev/",
    "https://openchain.xyz/signatures"
   ],
   "verified": true
  }
 ]
}