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We’re excited to announce today that @mastra has raised a $22M Series A led by Spark Capital.
This brings our total capital raised to $35M:
This brings our total capital raised to $35M:
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We completed our incident report + timeline for Wednesday's platform outage + the security breach at our underlying infra provider Railway:
mastra.ai/blog/platform-…
mastra.ai/blog/platform-…
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Sam Bhagwat retweeted
New article on how we built Halo 😇
A couple of decisions:
- Halo uses the same MCP server, skill and docs as external agents accessing Langfuse, so every new Halo functionality is immediately available to everyone.
- The agent loop runs separate from its sandbox.
- We use improve Halo.
Read the full article here: langfuse.com/blog/2026-10-2…
A couple of decisions:
- Halo uses the same MCP server, skill and docs as external agents accessing Langfuse, so every new Halo functionality is immediately available to everyone.
- The agent loop runs separate from its sandbox.
- We use improve Halo.
Read the full article here: langfuse.com/blog/2026-10-2…
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Langfuse built their in-app assistant with Mastra!
New article on how we built Halo 😇
A couple of decisions:
- Halo uses the same MCP server, skill and docs as external agents accessing Langfuse, so every new Halo functionality is immediately available to everyone.
- The agent loop runs separate from its sandbox.
- We use improve Halo.
Read the full article here: langfuse.com/blog/2026-10-2…
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Most LLMs get "context rot": recall decreases as context window approaches the context limit.
We wondered: do the new "System 1" decision models get context rot? So we tested Jev, Clef, and Luna Decisions across 400 questions.
Turns out decision models get context rot, too.
We wondered: do the new "System 1" decision models get context rot? So we tested Jev, Clef, and Luna Decisions across 400 questions.
Turns out decision models get context rot, too.
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Builds are back up. Our recommendation now: revoke and rotate keys for any env variables stored on Mastra platform.
To reiterate: we have no evidence of impact.
To reiterate: we have no evidence of impact.
Mastra's platform is hosted on Railway and thus Mastra platform users are affected by the ongoing Railway security incident.
Comms here as things evolve.
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Clarification btw: while Mastra platform users are on Railway, we have no evidence of impact.
Mastra platform users should check the logs of services with keys stored on Mastra platform for signs of unauthorized usage
Mastra platform users should check the logs of services with keys stored on Mastra platform for signs of unauthorized usage
Mastra's platform is hosted on Railway and thus Mastra platform users are affected by the ongoing Railway security incident.
Comms here as things evolve.
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Our latest recommendation:
Mastra platform users should check the logs of services with keys stored on Mastra platform for signs of unauthorized usage:
- Check access logs.
- Check if any new users or tokens were created that you don't recognize.
- Check the balance and activity from API tokens from AI inference providers that you have configured.
Mastra platform users should check the logs of services with keys stored on Mastra platform for signs of unauthorized usage:
- Check access logs.
- Check if any new users or tokens were created that you don't recognize.
- Check the balance and activity from API tokens from AI inference providers that you have configured.
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Mastra's platform is hosted on Railway and thus Mastra platform users are affected by the ongoing Railway security incident.
Comms here as things evolve.
Comms here as things evolve.
Today, we were alerted of malicious activity that compromised Railway's servers
We are sharing this with you broadly and swiftly. We recommend folks rotate their keys out of an abundance of caution.
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Clarification: x.com/calcsam/status…
Clarification btw: while Mastra platform users are on Railway, we have no evidence of impact.
Mastra platform users should check the logs of services with keys stored on Mastra platform for signs of unauthorized usage
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Our current dilemma: while Railway is recommending key rotation, since deploys are not working, and this would cause a production outage.
We are working on a non-Railway method of deploying keys on the Mastra platform
We are working on a non-Railway method of deploying keys on the Mastra platform
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This is restricted to Mastra platform users. If you are not a Mastra platform user, you are not affected.
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Today we're launching support for the latest MCP spec (MCP 2.0) in Mastra!
You can now scale servers without managing sessions and route requests using HTTP headers:
You can now scale servers without managing sessions and route requests using HTTP headers:
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