TLDR
- Allium, a blockchain data provider, found unauthorized access to some of its systems on October 25.
- The company revoked existing API keys and asked customers to reset passwords and turn on multifactor authentication.
- Main application and Explorer APIs are back, but uploaded data access, Allium Assistant and its MCP service were still down on October 28.
- Allium has not named the attacker, said how the access happened or said if customer data was stolen.
- The company raised $40 million in Series B funding in June.
Allium, a blockchain data provider, has confirmed that someone gained unauthorized access to some of its systems. The company detected the incident on October 25.
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CEO and co-founder Ethan Chan said Allium restricted access after it found the intrusion. The company notified affected customers directly and hired an independent cybersecurity firm to investigate.
Allium has not named the attacker or explained how the access occurred. It also has not said whether customer or end-user data was exposed.
Services and API Keys
Allium’s incident history shows its Explorer became unavailable on October 25. The company took its application offline on October 26 as a precaution.
By October 28, the Explorer and related APIs were working again. Existing API keys were being revoked, and customers were told to create new ones in the app or get them from their Allium contacts.
The company also recommended password resets and multifactor authentication. Access to previously uploaded datasets and the ability to upload new data stayed disabled. Queries that depend on those tables could not run.
Allium Assistant and its Model Context Protocol service were still unavailable in the October 28 notice.
Data Feeds Affected
The incident coincided with disruptions to Allium’s data delivery services. These feeds supply blockchain data to companies using Snowflake, Databricks and Google BigQuery.
An October 26 update said datashare tables were no longer getting fresh data. Customers could see stale results or errors.
Delivery has since restarted on all three platforms. Allium said it was still checking for missing records and filling gaps from the affected period.
Ethereum, Bitcoin, Solana and Base datasets on Snowflake and Databricks were being checked for freshness and completeness. Backfilling continued for other chains and for all chains on BigQuery. Work on Hyperliquid was still in progress.
Customers and Funding
Allium was founded in 2021 and serves institutional customers. It lists Visa and Coinbase as users of its data. Visa’s onchain analytics dashboard says it is powered by Allium.
The disclosure does not say Visa, Stripe or Coinbase had their own systems accessed. Allium did not name the customers it notified.
In June, Allium announced a $40 million Series B round led by Amplify Partners. Kleiner Perkins and Theory Ventures also took part. The company said then that its technology supported data operations across more than 150 blockchains.
Chan said Allium is strengthening its authentication and monitoring. “We’re sorry for the disruption this has caused our customers,” he wrote.
Allium plans to share a summary of its findings and response measures after the investigation ends. It has not said when that will happen.
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