{
 "generated": "2026-09-18",
 "count": 13,
 "deadlines": [
  {
   "date": "2026-09-21",
   "date_iso": "2026-09-21",
   "title": "Alchemy: EIP-7702 default changes to SemiModularAccount7702 v1.1.0 (Degen Mainnet support already ended Aug 31)",
   "detail": "Re-checked 2026-09-13: alchemy.com/docs/changelog unchanged. From Sept 21, 2026 new EIP-7702 accounts delegate to SemiModularAccount7702 v1.1.0 by default on every supported network (existing accounts unaffected). NFT API redundant V2/V3 endpoints (getCollectionsForOwner, getCollectionMetadata, isHolderOfCollection, etc.) sunset Sept 30, 2026 - migrate before then. Degen Mainnet support ended Aug 31 (Degen Chain sunsetting; bridge assets off). Latest entry still Sept 10, 2026 (wallet bug fixes, node upgrades); no new deprecations, pricing changes, or Avalanche/Robinhood/Solana additions. Re-checked 2026-09-14: changelog unchanged, newest entry still Sept 10. Re-checked 2026-09-15: changelog unchanged, newest entries Sept 10 and Sept 3; recent node upgrades cover Arc, Bitcoin, Hyperliquid, Scroll, Tempo, Worldchain, Sei, Polygon, Zora and others - nothing for Avalanche, Robinhood Chain or Solana. Re-checked 2026-09-16: alchemy.com/docs/changelog unchanged - newest entries still Sept 10 (node upgrades incl. Arc Mainnet, Bitcoin, Hyperliquid) and Sept 3; Aug 20 entry still says that beginning Sept 21, 2026 new EIP-7702 accounts created through wallet_prepareCalls default to SemiModularAccount7702 v1.1.0. No entries dated Sept 13-16, no pricing/credits/free-tier changes, no Avalanche additions; Robinhood appears only inside node-upgrade lists. Re-checked 2026-09-17: alchemy.com/docs/changelog unchanged - Aug 20 entry still says that beginning Sept 21, 2026 new EIP-7702 accounts created via wallet_prepareCalls/wallet_requestAccount delegate to SemiModularAccount7702 v1.1.0 by default; newest entry still Sept 10 (no entries Sept 11-17), no pricing/free-tier changes, no Avalanche additions.",
   "status": "upcoming"
  },
  {
   "date": "2026-09-22",
   "date_iso": "2026-09-22",
   "title": "Avalanche Helicon mainnet activation (Sept 22, 11:00 AM ET / 15:00 UTC) - AvalancheGo v1.15.0 required",
   "detail": "Re-checked 2026-09-13: build.avax.network/blog/helicon-upgrade confirms mainnet activation Sept 22, 2026 at 11:00 AM ET (15:00 UTC), live on Fuji since July 28, 2026, AvalancheGo v1.15.0 required, same six ACPs (194, 236, 267, 273, 283, 285). The GitHub tag page github.com/ava-labs/avalanchego/releases/tag/v1.15.0 fetched directly this run: release 'Helicon: Continuous Execution & Auto-Renewed Staking' exists, not a pre-release, plugin version 46, minimum Go 1.25.10, activation 3 PM UTC Sept 22 - resolving last run's open question. Note the GitHub releases index page still renders v1.14.2 as newest (index appears stale/cached); the tag page is authoritative. Validators should upgrade to v1.15.0 before Sept 22. Re-checked 2026-09-14: build.avax.network/blog/helicon-upgrade unchanged, no postponement. Re-checked 2026-09-15: build.avax.network/blog/helicon-upgrade and the v1.15.0 GitHub release both unchanged; no v1.15.1, no postponement. Seven days out. Re-checked 2026-09-16: build.avax.network/blog/helicon-upgrade (published Sept 8) still states mainnet activation Sept 22, 2026 at 11:00 AM ET (15:00 UTC) with AvalancheGo v1.15.0 required; no postponement. GitHub tag page v1.15.0 ('Helicon: Continuous Execution & Auto-Renewed Staking', full release, plugin version 46, min Go 1.25.10) still says all Mainnet nodes must upgrade before 11 AM ET Sept 22. github.com/ava-labs/avalanchego/releases/tag/v1.15.1 returns 404 (no v1.15.1 exists); the releases index page still renders v1.14.2 as newest (stale). Six days out. Re-checked 2026-09-17: build.avax.network/blog/helicon-upgrade (dated Sept 8) still states mainnet activation Sept 22, 2026 at 11:00 AM ET (15:00 UTC) with AvalancheGo v1.15.0 required; the v1.15.0 GitHub release (full release, plugin version 46, min Go 1.25.10) still says all Mainnet nodes must upgrade before 11 AM ET Sept 22; v1.15.1 tag still returns 404, no postponement; five days out.",
   "status": "upcoming"
  },
  {
   "date": "2026-09-25",
   "date_iso": "2026-09-25",
   "title": "Moralis removes Moonbeam, Moonriver and Lisk from Web3 Data API and RPC Nodes",
   "detail": "Re-checked 2026-09-13: docs.moralis.com/changelog Aug 26 entry unchanged - Moonbeam (0x504), Moonriver (0x505) and Lisk (0x46f) removed from Data API, Streams, RPC Nodes and Datashare on Sept 25, 2026 (unsupported-chain errors thereafter; streams on those chain IDs become invalid). Aug 11 entry notes Moonbeam/Moonriver stopped producing blocks Aug 1, 2026; historical data queryable until Sept 25. Migration: Base (0x2105) for GLMR/MOVR (ERC-20s on Base), Ethereum or Base for Lisk. No newer entries, no pricing changes, no new chain additions. Re-checked 2026-09-14: changelog unchanged (no entries after Aug 26); page also cites Lisk bridging until Oct 31 and shutdown Nov 30. Re-checked 2026-09-15: changelog newest entry still Aug 26; no pricing changes. Re-checked 2026-09-16: docs.moralis.com/changelog unchanged - newest entry still Aug 26, 2026 (Moonbeam 0x504, Moonriver 0x505, Lisk 0x46f removed Sept 25, 2026 across Data API, Streams, RPC Nodes, Datashare; migrate to Base/Ethereum). Older entries: Aug 11 (Moonbeam/Moonriver deprecation), Jul 31 (token holder + Solana token discovery endpoints removed), Jul 21, Jul 20. No pricing/free-tier changes, no Avalanche/Robinhood/Solana chain additions. Re-checked 2026-09-17: docs.moralis.com/changelog newest entry still Aug 26, 2026 confirming Moonbeam, Moonriver and Lisk removal on Sept 25, 2026 (unsupported-chain errors thereafter); no newer entries, no pricing changes.",
   "status": "upcoming"
  },
  {
   "date": "2026-09-25",
   "date_iso": "2026-09-25",
   "title": "ETHGlobal Tokyo 2026 (in-person hackathon) Sept 25-27",
   "detail": "Listed on ethglobal.com/events as the next ETHGlobal event after ETHOnline; prize pool not shown on the listing. Only relevant if travelling; ETHGlobal Mumbai follows Nov 5-7, 2026. Re-checked 2026-09-17: ethglobal.com/events still lists ETHGlobal Tokyo Sept 25-27, 2026 (IRL hackathon, no prize pool shown), with Pragma Tokyo on Sept 26 and ETHGlobal Mumbai Nov 5-7, 2026 following.",
   "status": "upcoming"
  },
  {
   "date": "2026-09-27",
   "date_iso": "2026-09-27",
   "title": "Nansen Meridian Buildathon ends Sept 27: last day for 2x API credits on purchases and for demo submissions",
   "detail": "nansen.ai/campaigns/meridian-buildathon: API credit purchases get 2x credits during Sept 14-27, 2026. Prizes: 1st $10,000 USDC, honorable mentions 100,000 API credits. Entry: API key at app.nansen.ai/api, 1,000 API calls, demo on X tagging @nansen_ai, submit at nsn.ai/meridian-submit (email, X link, GitHub repo). Added 2026-09-17.",
   "status": "upcoming"
  },
  {
   "date": "2026-09-30",
   "date_iso": "2026-09-30",
   "title": "Sui archival JSON-RPC fallback ends",
   "detail": "Foundation mainnet nodes are gRPC/GraphQL only; JSON-RPC code removed mid-October. Chainstack still serves Sui JSON-RPC. Re-checked 2026-09-16: docs.sui.io/develop/accessing-data/json-rpc-migration gives the timeline as: JSON-RPC disabled on Mainnet 'week of July 27, 2026' (shutoff took effect then), stop publishing snapshots 'end of August 2026', disconnect archival fallback 'end of September 2026', full decommission and code removal 'mid-October 2026'. The page states 'end of September' rather than a specific Sept 30 date; no last-updated timestamp visible. Migration targets are gRPC and GraphQL. Re-checked 2026-09-17: docs.sui.io migration page timeline unchanged - JSON-RPC disabled on Foundation mainnet nodes week of July 27, 2026 (done), snapshots stopped end of August, archival fallback disconnect 'end of September 2026', full decommission and code removal mid-October 2026; still no specific day given.",
   "status": "upcoming"
  },
  {
   "date": "2026-09-30",
   "date_iso": "2026-09-30",
   "title": "Alchemy sunsets nine legacy NFT API endpoints (migrate to V3)",
   "detail": "Alchemy changelog Aug 18, 2026: nine redundant NFT API endpoints are removed September 30, 2026; V3 replacements exist for most. Audit any code hitting Alchemy NFT API v2 endpoints and move to V3 before Sept 30. Added 2026-09-11 while re-checking the Sept 21 Alchemy entry. Re-checked 2026-09-15: sunset list confirmed on the changelog (getCollectionsForOwner, getCollectionMetadata, isHolderOfCollection, getSpamContracts, searchContractMetadata and others); unchanged. Re-checked 2026-09-16: Aug 18, 2026 changelog entry unchanged - redundant NFT API endpoints (getCollectionsForOwner, getCollectionMetadata, isHolderOfCollection, etc.) sunset September 30, 2026; 'most have a direct V3 replacement already available'. No newer entry modifies the date; newest changelog entry remains Sept 10. Re-checked 2026-09-17: Aug 18, 2026 changelog entry still states Alchemy is sunsetting a small set of redundant NFT API endpoints (both V2 and V3 versions) on September 30, 2026; no newer entry modifies the date.",
   "status": "upcoming"
  },
  {
   "date": "2026-10-01",
   "date_iso": "2026-10-01",
   "title": "QuickNode Solana gRPC metering rises 10 → 15 credits per 0.1 MB",
   "detail": "gRPC is included in Scale ($499) and Business since June; still no permanent free tier. Re-checked 2026-09-17: quicknode.com/docs/solana/yellowstone-grpc still says 'From October 1, 2026, metered usage is 15 credits per 0.1 MB', Solana gRPC included with Scale plans and up, no free tier; port 443 meters compressed data while legacy port 10000 meters uncompressed.",
   "status": "upcoming"
  },
  {
   "date": "2026-10-02",
   "date_iso": "2026-10-02",
   "title": "Arbitrum Open House Singapore buildathon submissions close (~Oct 2 per HackQuest countdown; Luma lists Oct 4)",
   "detail": "Buildathon started Sept 14 with registration still open on kickoff day (687+ participants, $115K online prizes, $415K program total). HackQuest 'Registration Close' countdown showed 18 days on Sept 14 (~Oct 2); the Luma program page says Sept 14 - Oct 4, so treat Oct 2 as the safe cutoff. At least one top-three slot per track reserved for Robinhood Chain projects; Arbitrum Sepolia deployment required. Founder House (in-person, Singapore) follows Oct 23-25.",
   "status": "upcoming"
  },
  {
   "date": "2026-10-12",
   "date_iso": "2026-10-12",
   "title": "Colosseum Crypto World's Fair hackathon ends / submissions close",
   "detail": "End of the 4-week build window; exact submission cutoff time not yet published on the official page.",
   "status": "upcoming"
  },
  {
   "date": "2026-10-15",
   "date_iso": "2026-10-15",
   "title": "Etherscan API: Robinhood Chain (4663) and Arc (5042) community endpoints free until Oct 15; Lite plan+ ($49/mo) required from Oct 16",
   "detail": "Etherscan changelog Sept 16, 2026: both chains' community endpoints are complimentary through Oct 15, 2026 and require a Lite plan or higher from Oct 16. Source-code and ABI endpoints stay free on all tiers. Use the free window to validate Robinhood Chain token/holder/tx queries under an existing key before deciding on Lite.",
   "status": "upcoming"
  },
  {
   "date": "ongoing",
   "date_iso": null,
   "title": "Chainlink CCIP v1 directory API slated for deprecation",
   "detail": "Migrate Chronicle's discovery to Tools API v2; rate limits undocumented.",
   "status": "ongoing"
  },
  {
   "date": "ongoing",
   "date_iso": null,
   "title": "Retro9000 archived; infraBUIDL no longer listed",
   "detail": "Avalanche small-grant path is now Team1 Builder Grants (Mini up to $10K, Accelerator up to $30K, opened Jul 1).",
   "status": "ongoing"
  }
 ]
}