Every week we read the changelogs nobody reads: removed endpoints, cut free tiers, retired chains, archived SDKs. Each item carries a date, who it hits, and the minimum you have to do about it. Deadline board first, then what is new, then the quiet changes no news site covers.
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Solana moved to 250 ms slots on 16 September while its upgrade page still says TBD. That pulls SNS's .sol cutoff forward to about 3 October.
Circle set five dates for leaving Noble. On-chain, 89.6% of Noble's USDC sits in IBC escrow, and the snapshot rules don't say what happens to it.
A bridge with $15m inside closed on 1 September after a hundred days of warnings and zero fees. Almost nobody came for the money.
We measured one dying chain five times in a month. Half the money left in six days — and the largest holder of what stayed is an abandoned contract.
We measured the same dying chain twice, eight days apart. The liquidity is still there, 84% of it inside two contracts the wallet never shows.
The first deadline the board named in advance has fired — Gnosisscan is gone. Polygon's Erigon sunset quietly took historical proofs with it.
LayerZero ends offchain support for 20 chains and Stargate exits five. Polygon's public RPCs are already gone, and Porto's funds deadline has passed.
Polygon dropped the Erigon namespace, Etherscan cut a fourth chain, Zapper's API goes dark tomorrow — this week's crypto infrastructure deprecations.
Every future deadline the series has found and verified against a primary source, rolling from issue to issue. The board lives here rather than inside an issue: reference material keeps growing and gets corrected after publication, and a mailing cannot be corrected.
Last swept September 29, 2026 · 39 open deadlines
| What | Deadline (UTC) | Required action | Left |
|---|---|---|---|
| Chainlink scheduled DOLO/USD (Arbitrum) for deprecation on 2026-09-16 together with USD0++/USD and plUSD/USDT (switched off 21.09 and 25.09). DOLO/USD is still alive: last update 2026-09-29 11:49:53 UTC (checked on-chain 2026-09-29 ~12:40 UTC)The announced date has passed and the thing has not happened — checked at the source. | September 16, 2026 | Watch updatedAt on the proxy, not the directory date; move off before it happens | overdue |
| CoinEx Smart Chain (CSC) and OneSwap cease operations; the CSC cross-chain bridge redemption window closes at the same time. No time of day given; the public RPC rpc.coinex.net returned 504 on 2026-09-29 12:51 UTC | September 29, 2026 | Redeem bridged CSC assets and move funds off CSC; drop CSC from supported networks | — |
| Base Cobalt hardfork on Base Mainnet at 18:00:00 UTC (timestamp 1790791200): B20 fee payments, validity transactions, dynamic upgrades in metrics-only mode, onchain TEE attestation | September 30, 2026, 18:00 UTC | Run base/base v1.4.2 (v1.4.1 is superseded, v1.4.0 has no mainnet Cobalt) from ghcr.io/base/node; drop --rollup.disable-tx-pool-gossip | — |
| Router Protocol winds down cross-chain operations and burns 303,333,198 ROUTE from the treasury — over 30% of the 1 bn max supply. DefiLlama showed $9,879.92 locked and no bridge volume over 30 completed days when the plan was reported | September 30, 2026 | Bridge out and withdraw from centralized venues before their own delisting deadlines — the notice points at venue deadlines, not at one common date | — |
| Alchemy removes 11 NFT API endpoints (V2 and V3); isAirdrop/isAirdropNFT and getNFTSales have no replacement | September 30, 2026 | Move calls to the V3 replacements; for the two without one, decide the substitute now | — |
| Shipyard ends IPFS maintenance and public infrastructure: ipfs.io, dweb.link, delegated-ipfs.dev, bootstrap nodes; Kubo/Helia/Boxo/Rainbow left without dedicated maintainers. Rate limiting on ipfs.io/dweb.link already in effect since 2026-08-25 | September 30, 2026 | Leave public gateways: @helia/verified-fetch in the browser, your own node (Rainbow/Someguy/Kubo) or a paid gateway on the backend | — |
| Chainlink scheduled 7 feeds for deprecation on 2026-09-30 (EIGEN/USD Ethereum, MLN/USD Arbitrum, FTT/USD Polygon and Gnosis, MAVIA/USD Base, OUSDT/USD Bob, SUSDAI/USD Plasma); the directory carries the same date for 3 more not named in the changelog: xSolvBTC NAV (Avalanche, BNB Chain) and BTCY NAV (Ethereum). On 2026-09-29 ~13:00 UTC all checked feeds were updating except BTCY NAV, last updated 2026-09-10 00:59:35 UTC | September 30, 2026 | Move off the feed before the date; treat BTCY NAV as already stale | — |
| LayerZero ends offchain (DVN/executor) services for Aurora, Taiko, Japan Open Chain, LightLink, Otherworld Space, Viction, Anime, XPLA, Merlin, Gnosis, Zora, Xai, opBNB. BounceBit, listed here since July, was moved back to 2026-08-28 by the 2026-09-25 edit. The page warns: 'Impacted chains and dates subject to change' | September 30, 2026 | Withdraw LP positions; bridge USDC.e, USDT and ETH to a supported chain | — |
| EF's 2025 plan put Sepolia's end of life at 2026-09-30 with a replacement testnet in March 2026. No replacement launched, and EF scheduled Glamsterdam on Sepolia for 2026-10-06; an EF DevOps proposal on Ethereum Magicians (not a decision) moves the sunset to Q2/Q3 2027. Third-party guides still say Sepolia retires on 30 September | September 30, 2026 | Nothing breaks on this date; do not migrate off Sepolia before a replacement is announced | — |
| Hiero (Hedera) Local Node is deprecated and to be archived in September 2026; successor is Solo. @hashgraph/hedera-local had 99,840 downloads in the week of 2026-09-21 and carries no npm deprecated flag | around September 30, 2026 | Move local and CI networks to Solo; pin Local Node images meanwhile | — |
| Stargate Bus mode ends; all transfers go through Taxi | October 1, 2026 | Re-check fee assumptions in integrations built on Bus batching | — |
| BitMEX starts charging monthly account service fees on all KYC'd accounts that still hold funds (the exchange closed 2026-09-23; withdrawals are web-only) | October 1, 2026 | Withdraw what is left via the web portal before fees start eating it | — |
| SNS pauses resolution of .sol domains in the official SDKs at slot 452,825,395; existing domains become .sns. The source gives a slot, not a day, and SNS's blog still says 'mid to late October' — at the measured slot rate (0.2675 s/slot on 2026-09-29) the slot lands on ~2026-10-03 04:25 UTC, or ~20:30 UTC the same day if slots slow back to early-September rates | around October 3, 2026 | Upgrade SNS SDKs (JS v3->v4, Kit v0.10->v1, Rust v1->v2), switch displayed suffix to .sns, do not rely on .sol resolution in payment flows | — |
| Glamsterdam (ePBS, block-level access lists, gas repricing incl. no refunds in block gas accounting, dearer state creation and calldata) activates on Sepolia at epoch 353,024. Required client releases carry their own breaks: Nethermind 2.0.0 config keys that crash on start, Erigon 3.7.0 needs x86-64-v2 and rejects two removed flags, Prysm 7.2.0 defaults to a 60M gas limit after the fork. Hoodi and mainnet: TBD | October 6, 2026, 13:53 UTC | Upgrade both EL and CL to the versions in EF's table after reading your client's breaking changes; test contracts against the repricing guide | — |
| Zcash NU7 activates on Testnet: 25-second blocks (ZIP 218), v4 transactions invalid (ZIP 2003), NSM (ZIP 237). Activation height not yet assigned — ZIP 259 says it is set on 2026-10-05 | October 6, 2026 | Testnet node operators and seeders: run a Zebra/Zakura release with NU7 heights before activation; test v5/v6-only transaction construction | — |
| Chainlink deprecates lastTradedPrice on 24/5 U.S. Equity Streams: after this date the field is not monitored for availability or quality | October 12, 2026 | Stop using lastTradedPrice as an execution price; move to mid/bid/ask | — |
| Circle disables new minting of USDC on Noble through Circle Mint (redemption continues until 2027-01-12). First of five dates in Circle's exit from Noble; no times of day are given for any of them | October 13, 2026 | Move USDC.n off Noble-denominated routes: migrate to USDC.inj (Skip:Go, Keplr banner, Osmosis 1:1 transmuter) or withdraw via an exchange | — |
| Sui JSON-RPC fully decommissioned, including code removal. Intermediate step per the migration guide: the implicit fallback from JSON-RPC to the archival service is disconnected at the end of September 2026 | around October 15, 2026 | Finish migrating to gRPC or GraphQL RPC; confirm your provider offers them | — |
| Etherscan: community endpoints for Arc Mainnet (5042) and Robinhood Chain (4663) — free until 2026-10-15 — require Lite or above; networks now arrive with the date their free access ends | October 16, 2026 | Budget for Lite or read from your own RPC/indexer | — |
| Balancer wind-down (BIP-928; Snapshot vote closes 2026-09-29 18:00 UTC, at 12:40 UTC ~16.8M BAL for, 0.14M against, quorum met): last day for partners to ask that a v3 pool keep running until 2026-11-30 instead of pausing on 2026-10-30 | October 16, 2026 | If you run a v3 pool or integration and need more time to migrate, ask Balancer by this date | — |
| Stargate v2 drops Gravity, Camp, GOAT and Metis (added by the 2026-09-25 edit); offchain services for the same chains end a week later | October 23, 2026 | Gravity/GOAT: bridge USDC.e, Hydra USDT, WETH out; Camp: USDC.e, WETH; Metis: withdraw S*USDT, S*ETH and Metis Pool LP | — |
| Balancer wind-down (BIP-928): pausable pools (v2 and v3) are paused and move to withdrawals only, with recovery mode where the contracts require it; the protocol fee goes to zero on the rest where allowed; the bug bounty ends; the frontend and routing treat the protocol as discontinued | October 30, 2026 | LPs: exit or use the documented withdrawal path. Routers and aggregators: drop Balancer pools from routes before this date | — |
| LayerZero ends offchain (DVN/executor) services for Gravity, Camp, Lisk, GOAT and Metis (added 2026-09-25) | October 30, 2026 | OApps on these chains: plan your own DVN/executor or migrate; users: exit Stargate assets by 2026-10-23 | — |
| CCTP V1 burn limits start reducing towards zero (Circle's Noble exit) | October 31, 2026 | Exit Noble via CCTP V1 before limits shrink | — |
| LayerZero narrows testnet support to 'roughly ten prioritized testnets'; the rest are phased out 'by the end of October' (list promised in the docs) | around October 31, 2026 | Check whether your testnet stays; plan a move if not | — |
| Zebra 6.4.x reaches its end-of-support halt 'approximately Nov 2nd, 2026' (window cut from 15 to 12 weeks for NU7). 6.4.0 and 6.4.1 are withdrawn — 6.4.2 fixes DoS GHSA-h5rr-8pqv-grp9 | November 2, 2026 | Run 6.4.2 now; install the NU7-supporting release before the halt | — |
| Zcash NU7 on Mainnet (target): 25-second blocks, per-block subsidy divided by 3, v4 transactions invalid — Sprout funds become unspendable. Mainnet height and go/no-go decided 2026-10-20; zcashd is archived and does not support NU7 | November 5, 2026 | Node operators: upgrade Zebra/Zakura to the NU7 release. Wallets/exchanges: stop building v4 transactions, revisit confirmation counts. Sprout holders: move funds out before activation | — |
| Solana rent reduction phases 3-5 (SIMD-0437-3/4/5): lamports_per_byte down to 2,575 -> 1,322 -> 696 (-90% against the original 6,960), expected with Agave 4.4. An empty account ends at 89,088 lamports | around November 15, 2026 | Same as phase 2: no hardcoded rent constants anywhere in client or program code | — |
| Solana SIMD-0500: after activation, deploys, upgrades and finalizations of programs built for sBPF v0-v2 are rejected; deployed programs keep running. Expected with Agave 4.4 in November 2026; feature not active on any cluster on 2026-09-29 | around November 15, 2026 | Rebuild for sBPFv3 now (Solana CLI 4.3.0; Anchor 0.30.2/0.31.2/0.32.2/1.2.0+, Pinocchio 0.10+, solana-program 2.3.0+) and check the .so header flag 0x3 | — |
| Balancer wind-down (BIP-928): the v3 Vault is paused; v3 pools kept alive at partners' request move to withdrawals only | November 30, 2026 | Partners with kept-alive v3 pools: finish migrating liquidity | — |
| CCTP V1 (Legacy) contracts are paused on all chains; from Noble, exits 'may be limited' to chains still supporting V1 burns | December 1, 2026 | Migrate integrations to CCTP V2; drop Noble routes | — |
| Google Cloud Blockchain Node Engine and Blockchain RPC shut down | December 15, 2026 | Provision replacement endpoints (Google points to QuickNode), repoint apps, delete legacy nodes | — |
| LayerZero Labs Relayer for Endpoint v1 (ULNv2) deprecated; apps pinned to ULNv2 get 'messages unable to be executed'. V1 bug bounty closes the same day | December 15, 2026 | Move OApp v1 config to ULNv301 or run your own relayer | — |
| STG -> ZRO conversion ends | December 15, 2026 | Convert STG before the date | — |
| CoinEx exchange closes for good: withdrawals end. Non-USDT assets were converted to USDT or delisted from 2026-09-29 02:00 UTC; unwithdrawn USDT goes to independent custody with a 5%/month fee on the end-of-window balance; custody claims close 2028-08-22 | December 22, 2026, 02:00 UTC | Withdraw everything before 02:00 UTC; don't leave it to the last day | — |
| Silicon Network (Polygon CDK L2 tied to Korbit) ends its withdrawal window; explorer shutdown and network termination follow, unwithdrawn assets unrecoverable. Bridge deposits stopped 2026-09-02; tokens issued inside the network cannot be bridged to Ethereum | December 31, 2026, 03:00 UTC | Bridge Ethereum-origin assets back to mainnet; sell native tokens inside while liquidity lasts; keep ETH for gas | — |
| Noble USDC contract and CCTP routes fully paused; Circle snapshots all USDC balances on Noble. Manual redemption opens 2027-01-13 for 'a holder-controlled wallet' whose address is in the snapshot. The announcement does not say what happens to USDC held by pools, contracts or IBC escrow — which on 2026-09-18 03:21 UTC was 91,390,167 of 102,047,335 USDC on Noble (89.6%), held for other Cosmos chains | January 12, 2027 | Hold USDC in a wallet you control on Noble itself, or off Noble entirely, before the pause | — |
| Polygon zkEVM claims window closes; unclaimed migrated assets considered abandoned | December 31, 2027 | Claim exit-snapshot balances on Ethereum via the claims interface | — |
| Ethereum Hoodi testnet end-of-life (planned lifecycle) | September 30, 2028 | None yet — the point is that the date exists up front | — |
Deadlines that have already arrived. Kept rather than deleted: the series is about what got switched off, and the record of it is the point.