Blog — Apr 2026 till Mar 2026
Updates, tutorials, and engineering deep-dives on building AI agents, workflows, and TypeScript tooling with Mastra.
We raised a $22M Series A to help every developer build agents
Mastra raises a $22M Series A led by Spark Capital, bringing total funding to $35M. Plus: the Mastra platform launches today.
Introducing Agent Editor
Edit agent instructions, tools, and display conditions from Studio with draft/publish versioning, or programmatically through the editor API.
Introducing Metrics and Logs
Mastra Studio now supports logs, traces, and metrics, so you can understand how your agents behave in production.
Mastra Changelog 2026-03-23
Token-aware model routing for observational memory, MongoDB-backed versioned datasets and experiments, Okta SSO auth with RBAC, workflow upgrades, tool suspension handling, and observability improvements.
Mastra Changelog 2026-03-17
AI Gateway tool support in the agentic loop, more reliable observational memory, MCP client diagnostics and per-server control, and improved tracing with spanId, working memory and schema fixes.
Introducing Studio Auth: Secure, Team-Friendly Access for Deployed Mastra Studios
Secure your deployed Mastra Studio with login screens, third-party identity providers, and role-based permissions.
Mastra Changelog 2026-03-13
Persistent agent workspace filesystem, observability pipeline upgrades, type-safe server route inference, lower token costs for long-running Observational Memory, and breaking changes to metrics, scores, and ObservabilityBus configuration
Mastra Changelog 2026-03-12
Cloudflare Durable Objects storage adapter,improved observability for MCP tooling, more reliable agent loops and token budgeting, sandbox and workspace extensibility via provider-specific getters and string PIDs
Mastra Changelog 2026-03-11
Dynamic model fallback arrays, Standard Schema normalization with Zod v4 compatibility, customizable request validation for server adapters, and end-to-end RequestContext support for tracing and datasets/experiments.
Safely Execute Untrusted Code with Remote Sandboxes
Three new sandbox providers for safely running agent code in isolated cloud containers.
Mastra Changelog 2026-03-05
Improve tool-call accuracy, MCP fetch hooks receive RequestContext, and reliability updates surface streaming errors, preserve history in stateless tool runs, and clean up orphaned vector embeddings.
Mastra Changelog 2026-03-04
Token-aware workspace output, smarter truncation, LSP resolution, sandbox process control, end-to-end auth and RBAC, workflow path tracking, concurrent-safe snapshots, and harness.sendMessage() file support.