> ## Documentation Index > Fetch the complete documentation index at: https://docs.chainstack.com/llms.txt > Use this file to discover all available pages before exploring further. # Stable methods > Complete reference of Stable JSON-RPC methods supported on Chainstack, with per-method availability for the eth, debug, txpool, net, and web3 namespaces. Live-tested against Chainstack Stable nodes. The trace namespace is not served. Our pricing is simple: 1 RU per full request, 2 RUs per archive. For which EVM methods are full vs archive, see [Request units — EVM methods affected by block age](/docs/request-units#evm-methods-affected-by-block-age). Stable is an EVM-compatible layer 1. Chain ID is `988`. Chainstack nodes run the `stabled` client, which is built on the Cosmos SDK and serves an Ethereum-compatible JSON-RPC surface on top of it. The availability below is verified against Chainstack Stable nodes. ## The trace namespace is not served Stable serves `debug_*` but not `trace_*`. All nine Parity-style trace methods return `-32601`: `trace_block`, `trace_transaction`, `trace_call`, `trace_callMany`, `trace_filter`, `trace_get`, `trace_rawTransaction`, `trace_replayBlockTransactions`, and `trace_replayTransaction`. If you are porting code from Ethereum, Arc, or World Chain, swap the calls before you deploy: | Instead of | Use | | ------------------- | ---------------------------------------------------------- | | `trace_block` | `debug_traceBlockByNumber` with `{"tracer": "callTracer"}` | | `trace_transaction` | `debug_traceTransaction` with `{"tracer": "callTracer"}` | | `trace_call` | `debug_traceCall` with `{"tracer": "callTracer"}` | `rpc_modules` is available on Stable and reports the served namespaces accurately: `debug`, `eth`, `net`, `rpc`, `txpool`, and `web3`. The available tracing methods are `debug_traceTransaction`, `debug_traceBlockByNumber`, `debug_traceBlockByHash`, and `debug_traceCall`, all of which need a [paid plan](https://chainstack.com/pricing/) — see [Debug and trace APIs](/docs/debug-and-trace-apis#stable). The native tracers `callTracer`, `prestateTracer`, `4byteTracer`, and `noopTracer` are enabled; `flatCallTracer` and `muxTracer` are not — see [Available native tracers](/docs/limits#available-native-tracers). ## Pending transactions are accepted but never delivered The `txpool_*` methods respond on Stable, so `txpool_status`, `txpool_content`, `txpool_contentFrom`, and `txpool_inspect` all return successfully. They always report an empty pool. Across 30 samples taken every 4 seconds over two minutes, `txpool_status` returned `pending: 0x0, queued: 0x0` every time, while 52 transactions confirmed in new blocks over the same window. The pool is not exposed through the EVM JSON-RPC layer. `eth_newPendingTransactionFilter` and `eth_subscribe("newPendingTransactions")` both hand back an ID and then deliver nothing. Do not build a pending-transaction feed on Stable. See [What gives you mempool access](/docs/mempool-configuration#what-gives-you-mempool-access). ## Filters on a load-balanced endpoint A [Global Node](/docs/global-elastic-node) endpoint is load balanced across backends, and a filter created by `eth_newFilter` or `eth_newBlockFilter` lives on the single backend that created it. A follow-up `eth_getFilterChanges` that lands on a different backend returns `-32000 filter not found`. Poll with [eth\_getLogs](/reference/ethereum-getlogs) over an explicit block range instead, or use a WSS subscription, which holds one connection to one backend for its lifetime. ## Cosmos SDK behavior to expect The Cosmos SDK foundation shows through in three places: * `eth_getProof` returns a Cosmos IAVL proof, not an Ethereum Merkle-Patricia proof, so it is not a drop-in for Ethereum state-proof verification. It also needs an explicit block number — passing `latest` returns `-32000 proof queries at height <= 2 are not supported`. * `debug_printBlock` and `debug_intermediateRoots` return `-32000 profiling disabled in the debug namespace`. * `eth_createAccessList` returns `-32603 method handler crashed` for every request shape tested. Since Stable charges a flat base fee, an access list buys you nothing here anyway. `eth_simulateV1` is not implemented. `eth_blobBaseFee` is not either — Stable takes no blob transactions. ## Block time and archive billing Stable produces a block roughly every 0.7 seconds. The standard EVM rule — 127 or more blocks behind the tip bills as archive — therefore covers only about 90 seconds of history, against roughly 25 minutes on Ethereum. On Stable, expect most historical queries to bill as archive. ## Method availability | Method | Availability | Comment | | ---------------------------------------- | --------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | debug\_accountRange | | returns `-32601` | | debug\_chaindbProperty | | returns `-32601` | | debug\_codeByHash | | returns `-32601` | | debug\_dumpBlock | | returns `-32601` | | debug\_getAccessibleState | | returns `-32601` | | debug\_getBadBlocks | | returns `-32601` | | debug\_getModifiedAccountsByHash | | returns `-32601` | | debug\_getModifiedAccountsByNumber | | returns `-32601` | | debug\_getRawBlock | | | | debug\_getRawHeader | | returns `-32601` | | debug\_getRawReceipts | | returns `-32601` | | debug\_getRawTransaction | | returns `-32601` | | debug\_getTrieFlushInterval | | returns `-32601` | | debug\_intermediateRoots | | returns `-32000 profiling disabled in the debug namespace` | | debug\_preimage | | returns `-32601` | | debug\_printBlock | | returns `-32000 profiling disabled in the debug namespace` | | debug\_storageRangeAt | | returns `-32601` | | debug\_traceBadBlock | | returns `-32601` | | debug\_traceBlock | | takes an RLP-encoded block | | debug\_traceBlockByHash | | | | debug\_traceBlockByNumber | | | | debug\_traceCall | | | | debug\_traceTransaction | | | | eth\_accounts | | returns an empty array — no unlocked accounts on a hosted node | | eth\_blobBaseFee | | returns `-32601` | | eth\_blockNumber | | | | eth\_call | | | | eth\_chainId | | | | eth\_coinbase | | returns `-32601` | | eth\_createAccessList | | returns `-32603 method handler crashed` for every request shape tested | | eth\_estimateGas | | | | eth\_feeHistory | | | | eth\_gasPrice | | | | eth\_getAccount | | returns `-32601` | | eth\_getBalance | | | | eth\_getBlockByHash | | | | eth\_getBlockByNumber | | | | eth\_getBlockReceipts | | | | eth\_getBlockTransactionCountByHash | | | | eth\_getBlockTransactionCountByNumber | | | | eth\_getCode | | | | eth\_getFilterChanges | | filters are node-local — see [Filters on a load-balanced endpoint](#filters-on-a-load-balanced-endpoint) | | eth\_getFilterLogs | | | | eth\_getHeaderByHash | | | | eth\_getHeaderByNumber | | | | eth\_getLogs | | | | eth\_getProof | | pass an explicit block number — `latest` returns `-32000 proof queries at height <= 2 are not supported`. The proof is a Cosmos IAVL proof, not an Ethereum Merkle-Patricia proof | | eth\_getRawTransactionByHash | | returns `-32601` | | eth\_getStorageAt | | | | eth\_getTransactionByBlockHashAndIndex | | | | eth\_getTransactionByBlockNumberAndIndex | | | | eth\_getTransactionByHash | | | | eth\_getTransactionBySenderAndNonce | | returns `-32601` | | eth\_getTransactionCount | | | | eth\_getTransactionReceipt | | | | eth\_getUncleByBlockHashAndIndex | | always null — Stable has no uncles | | eth\_getUncleByBlockNumberAndIndex | | always null — Stable has no uncles | | eth\_getUncleCountByBlockHash | | | | eth\_getUncleCountByBlockNumber | | | | eth\_hashrate | | returns `-32601` | | eth\_maxPriorityFeePerGas | | | | eth\_mining | | returns `-32601` | | eth\_newBlockFilter | | | | eth\_newFilter | | | | eth\_newPendingTransactionFilter | | accepts the filter but never returns a transaction — see [Pending transactions](#pending-transactions-are-accepted-but-never-delivered) | | eth\_protocolVersion | | | | eth\_sendRawTransaction | | | | eth\_sendRawTransactionSync | | returns `-32601` | | eth\_simulateV1 | | returns `-32601` | | eth\_subscribe | | WSS. `newHeads` and `logs` deliver. `newPendingTransactions` subscribes but delivers nothing; `syncing` returns `-32600 syncing subscription is not implemented` | | eth\_syncing | | | | eth\_uninstallFilter | | | | eth\_unsubscribe | | WSS | | net\_listening | | | | net\_peerCount | | | | net\_version | | | | rpc\_modules | | | | trace\_block | | returns `-32601` | | trace\_call | | returns `-32601` | | trace\_callMany | | returns `-32601` | | trace\_filter | | returns `-32601` | | trace\_get | | returns `-32601` | | trace\_rawTransaction | | returns `-32601` | | trace\_replayBlockTransactions | | returns `-32601` | | trace\_replayTransaction | | returns `-32601` | | trace\_transaction | | returns `-32601` | | txpool\_content | | responds, but the pool always reads empty — see [Pending transactions](#pending-transactions-are-accepted-but-never-delivered) | | txpool\_contentFrom | | responds, but the pool always reads empty | | txpool\_inspect | | responds, but the pool always reads empty | | txpool\_status | | responds, but the pool always reads empty | | web3\_clientVersion | | | | web3\_sha3 | | |