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docs(pricing): switch Base Flashblocks subscriptions to event-based pricing #1266

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masterbd merged 2 commits into from
May 8, 2026
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docs(pricing): switch Base Flashblocks subscriptions to event-based pricing #1266

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docs(pricing): switch Base Flashblocks subscriptions to event-based p…
masterbd Apr 27, 2026
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docs(pricing): drop code-formatting on Flashblocks subscription names
masterbd Apr 27, 2026
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14 changes: 7 additions & 7 deletions content/api-reference/pricing-resources/pricing/compute-unit-costs.mdx
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Expand Up @@ -373,15 +373,15 @@ Similar to the [NFT API](/docs/reference/compute-unit-costs#nft-api), the Wallet

# Webhooks and Subscription APIs

[Webhooks](/docs/reference/notify-api-quickstart) and [WebSocket Subscriptions](/docs/websocket-subscriptions) on Alchemy are priced based on **bandwidth:** the amount of data delivered as part of the subscription.
[Webhooks](/docs/reference/notify-api-quickstart) and [WebSocket Subscriptions](/docs/websocket-subscriptions) on Alchemy are priced based on **bandwidth** (the amount of data delivered) by default, except for Base Flashblocks subscriptions, which are priced **per event**.

Each subscription type is priced identically per byte:
| Subscription | Pricing |
| ------------------------- | -------------- |
| newFlashblockTransactions | 40 CU / event |
| newFlashblocks | 60 CU / event |
| All other subscriptions | 0.04 CU / byte |

| Bandwidth | CU |
| --------- | --- |
| 1 byte | .04 |

On average, a typical webhook or WebSocket subscription event is about 1000 bytes, so it would consume 40 compute units. Note that this can vary significantly based on the specific event delivered [Subscription API Quickstart](/docs/reference/subscription-api)
On average, a typical byte-priced webhook or WebSocket subscription event is about 1000 bytes, so it would consume 40 compute units. Note that this can vary significantly based on the specific event delivered. See the [Subscription API Quickstart](/docs/reference/subscription-api) for details.

# Polygon PoS: Specific Methods

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