Key takeaways
- Raydium CPMM and CLMM pools have never needed an OpenBook market ID, according to Raydium's documentation as of November 2026.
- Raydium's July 22, 2026 upgrade removed AMM v4's OpenBook dependency, and its instruction reference now describes the market account at pool creation as not validated.
- At the current rent rate of 5,080 lamports per byte, an OpenBook v1 market locks about 0.24 SOL of rent at the minimum size and about 2.03 SOL at the standard size.
- OpenBook v1 has no instruction to close a market, so the rent locked in a market's accounts is effectively a one-time, non-refundable listing cost.
- OpenBook v1 vaults are SPL Token accounts, so Token-2022 tokens cannot get an OpenBook v1 market and should use a Raydium CPMM pool.
The short answer
Most new Solana tokens do not need an OpenBook market ID in November 2026. Raydium's CPMM and CLMM pools never used one, and Raydium's July 22, 2026 upgrade removed the OpenBook dependency from the legacy AMM v4 pool too. If a tool or script still asks you for one, an OpenBook v1 market costs about 0.24 SOL of rent at the minimum size and about 2.03 SOL at the standard size, at the current rent rate, and that rent cannot be recovered.
Why did Raydium pools need an OpenBook market?
Raydium's original pool, AMM v4, was built in the Serum era to share liquidity with an on-chain order book. Creating a pool meant pointing it at an existing Serum (later OpenBook) market for the same pair, and the market ID was that market's address. That is why launch guides from 2022 to 2025 have a "create a market ID" step, often with a cost of 2 to 3 SOL.
Three things have changed since:
- CPMM arrived. Raydium's constant-product CPMM program needs no market, supports Token-2022 and is what Raydium now recommends for new pairs. Its docs say "CPMM and CLMM never had an OpenBook dependency."
- AMM v4 stopped using the order book. Raydium's changelog says AMM v4 "stopped sharing liquidity to OpenBook (formerly Serum) a long time ago", and the July 2026 upgrade removed the remaining Serum code.
- The market is no longer checked. Raydium's AMM v4 instruction reference describes the market account in
Initialize2, the pool creation instruction, as "Not validated — used only as the variable seed for every PDA above". Raydium's guide also says not to open new AMM v4 positions "unless you specifically need OpenBook orderbook connectivity for an existing pair."
So the pool type that needed a market is now one Raydium steers you away from, and even that one only uses the market address as a seed. Raydium CPMM vs AMM v4 vs CLMM has the full comparison.
When might you still need an OpenBook market?
Rarely, but there are cases:
- A tool or script built for the old flow. Some launch tools and older SDK scripts still ask for a market ID before they will create an AMM v4 pool.
- You want an order book for your pair. If you or a market maker want to place limit orders on OpenBook itself, a real market is the point.
- Your token already trades on an AMM v4 pool tied to a market and you are rebuilding around it.
If none of those applies, skip the market and create a Raydium CPMM pool instead. It costs Raydium's 0.15 SOL create fee plus a few hundredths of a SOL in rent, which is less than even the smallest market.
How much does an OpenBook market ID cost?
Nearly all of it is rent for the market's seven accounts: the market state, two token vaults, a request queue, an event queue and the bids and asks order books. Rent scales with bytes, so the cost depends on how long you make the queues and books. At the current rate of 5,080 lamports per byte, as of November 2026:
| Size preset | Event queue | Request queue | Order books (each side) | Rent locked |
|---|---|---|---|---|
| Minimum | 128 events | 63 requests | 201 orders | about 0.24 SOL |
| Medium | 1,400 events | 63 requests | 450 orders | about 0.99 SOL |
| Standard | 2,978 events | 63 requests | 909 orders | about 2.03 SOL |
These are the presets in SOLTidy's OpenBook Market Creator, which reads the rent live and adds a 0.1 SOL fee, so the minimum market costs about 0.34 SOL in total. The standard size matches what Raydium's own market tool used for years; under the old rent rate of 6,960 lamports per byte it worked out to about 2.8 SOL, which is where older guides' figures come from.
The rent is not spent in the sense of a fee, but it is gone in practice: OpenBook v1 has no instruction to close a market, so the SOL stays in those accounts.
Is a cheap OpenBook market good enough?
For a Raydium AMM v4 pool, yes. Trades go through the AMM's reserves, not through the order book, so the size of the market's queues does not change the pool's liquidity, price or slippage. The minimum preset is the size many AMM v4 pools were created on. A larger market only matters if real order-book trading will happen on it.
Two settings do need care when you create a market:
- Minimum order size (base lot). In raw units of your token. Too large and small orders are impossible.
- Tick size (quote lot). The smallest price step. Too coarse and a low-priced token cannot be quoted precisely.
SOLTidy suggests both from your token's supply and decimals, and refuses values that would round to zero. Neither affects AMM swaps.
Can a Token-2022 token get an OpenBook market?
No. OpenBook v1 vaults are classic SPL Token accounts, so the program accepts only SPL Token mints. Token-2022 tokens, including tax tokens with a transfer fee, go to a Raydium CPMM pool, which supports Token-2022 with an extension allow-list.
How do you create one if you need it?
- Check whether a market already exists for your pair; an existing market works just as well, and SOLTidy's tool warns when it finds one.
- Paste the base mint and pick the quote, usually SOL or USDC.
- Choose a size. Minimum is enough for an AMM v4 pool.
- Check the lot and tick sizes, then approve two transactions: the first creates the vaults and market account, the second creates the queues and books and initializes the market.
- Copy the market ID into the pool creation flow that asked for it.
Bottom line
As of November 2026, the OpenBook market ID is a leftover from Raydium's AMM v4 era. CPMM is cheaper, simpler and supports Token-2022, and Raydium recommends it for new pairs. Create a market only when a specific tool, an existing pair or real order-book trading requires one, and use the minimum size unless you know you need more. The token cost breakdown puts it next to everything else a launch costs.
Questions & answers
How much does an OpenBook market ID cost?
The cost is almost all rent for the market's queues and order books. At the current rate of 5,080 lamports per byte, the common minimum size locks about 0.24 SOL, a medium size about 0.99 SOL and the standard size about 2.03 SOL. Tools add their own fee; SOLTidy's is 0.1 SOL. Under the old rent rate the standard size was about 2.8 SOL.
Do I need an OpenBook market ID to create a Raydium pool?
Not for CPMM or CLMM pools, which Raydium says never had an OpenBook dependency. Only the legacy AMM v4 pool type was tied to a market, and since Raydium's July 2026 upgrade its program no longer validates that market. Raydium recommends CPMM for new token pairs.
Is a cheap OpenBook market safe to use?
For a Raydium AMM v4 pool, a minimum-size market is enough, because trades go through the AMM, not the order book. Small queues only limit how much order-book activity the market can hold at once. They do not affect the pool's liquidity or price.
Can I get the OpenBook market rent back?
No. OpenBook v1 has no instruction for closing a market, so the SOL in its accounts stays there. Treat it as a one-time cost. This is one more reason a CPMM pool, which needs no market, is the cheaper route for a new token.
Can I create an OpenBook market for a Token-2022 token?
No. OpenBook v1 vaults are classic SPL Token accounts, so the program only accepts SPL Token mints. A Token-2022 token, including a tax token with a transfer fee, should use a Raydium CPMM pool, which supports Token-2022 and needs no market.
