eth_getTransactionCount

Return an account nonce at a block.

Base mainnet, chain ID 8453base:rpcfree — enforced matrix policy, not measured capacity or runtime publicationAvailability: unknownValidation: documented

Parameter limits

JSON path	Frozen limit	Source
—	`unknown`	No numeric parameter ceiling is frozen; enforce the declared schema shape and deny an unknown oversized/range profile.

Parameter-dependent tier profiles from CAPABILITIES:

bounded_current_state_or_logs: minimum free, budget base_read_rpc.
historical_state_or_heavy_range_or_overrides: minimum pro, budget base_read_rpc_heavy; gate: verified per-provider depth/range/schema; null limit denies.

Historical block retrieval is not an archive-state guarantee. Selectors must be preserved; do not substitute pending, safe, or finalized with latest.

Rate limits and tier

These are enforced product-policy values, not measured upstream capacity or an SLA. Enterprise is finite, never physical “unlimited” capacity.

Tier	Limit / access	Category
Free	10 RPS	base_read_rpc
Basic	20 RPS	base_read_rpc
Pro	100 RPS	base_read_rpc
Business	250 RPS	base_read_rpc
Enterprise	250 RPS	base_read_rpc

See Base limits.

Errors

Code	Meaning here	Client action
`-32602`	Parameters fail the declared schema or upstream parser.	Fix the positional parameters; parser acceptance is not execution success.
`-32003`	The enforced category/provider budget is exhausted.	Honor `Retry-After`; no capacity SLA is implied.

Authentication/transport failures use the shared client error envelope. See Base errors.

Evidence

Fixture kind: negative.
Fixture source: infra-4-sety/integration-base/research/R00/import/originals/probe/bse_v2t6_fp_snapshot.json.
Fixture SHA-256: 7afbec087e14a1b39cb4ad7bcd2ee64cc2dd5b83e86b85ceced53387a9f935d9.
Fixture registry: infra-4-sety/integration-base/research/R00/import/FIXTURES_INDEX.json.
Semantic assertion: 2396752-2396216=536; rate unknown without start/end request UTC/block/tag.
Evidence boundary: Replay only this bounded assertion; no provider calls or original Python execution. Metadata/response fragments can test rejection but cannot prove capability.

Limitations

Availability is the frozen baseline, not deployed readiness. documented is the contract floor; evidence_kind retains unknown/source_summary.

Params schemadocumented

JSON

[
  {
    "name": "address",
    "required": true,
    "schema": {
      "$ref": "#/components/schemas/Address"
    }
  },
  {
    "name": "block",
    "required": true,
    "schema": {
      "$ref": "#/components/schemas/BlockTag"
    }
  }
]

Result schemaOpenRPC

JSON

{
  "name": "transactionCount",
  "schema": {
    "$ref": "#/components/schemas/Quantity"
  }
}