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`/docs/rest-api/sdk/marketplace/create-one-or-multiple-experimentation-items` does not exist. Similar pages:

- [Create one or multiple experimentation items (Vercel SDK)](/docs/rest-api/sdk/marketplace/create-one-or-multiple-experimentation-items.md): POST /v1/installations/{integrationConfigurationId}/resources/{resourceId}/experimentation/items Create one or multiple experimentation items
- [Create one or multiple experimentation items](/docs/rest-api/marketplace/create-one-or-multiple-experimentation-items.md): POST /v1/installations/{integrationConfigurationId}/resources/{resourceId}/experimentation/items Create one or multiple experimentation items
- [Create one or multiple experimentation items](/docs/integrations/create-integration/marketplace-api/reference/vercel/post-v1-installations-resources-experimentation-items.md): APIs & SDKs Marketplace Vercel API Create one or multiple experimentation items
- [Create one or multiple experimentation items](/docs/integrations/create-integration/marketplace-api/reference/vercel/createinstallationsbyintegrationconfigurationidresourcesbyresourceidexperimentationitems.md): APIs & SDKs Marketplace Vercel API Create one or multiple experimentation items
- [Patch an existing experimentation item (Vercel SDK)](/docs/rest-api/sdk/marketplace/patch-an-existing-experimentation-item.md): PATCH /v1/installations/{integrationConfigurationId}/resources/{resourceId}/experimentation/items/{itemId} Patch an existing experimentation item

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