Changelog

June 2026

• New — Standalone tracing. Send spans to PromptRails from any application, even one that does not manage its prompts or agents on the platform — use PromptRails as a standalone LLM observability backend. Adds the traces:write API key scope, a native batch ingest endpoint (POST /api/v1/traces/ingest), and an OpenTelemetry OTLP/HTTP endpoint. See Tracing.
• New — SDK tracing modules for Python, JavaScript, and Go, with automatic parent/child nesting and framework auto-instrumentation for LangChain, OpenAI, Anthropic, Google GenAI, and OpenTelemetry.
• New — More providers and Bedrock (LangRails v0.7). Expanded the supported LLM provider catalog (including Amazon Bedrock) with provider feature toggles and model-deprecation handling. See Prompts.
• Improved — Prompt caching support and cached-token usage reporting.
• SDKs: Python and JavaScript v0.7.0, Go v0.6.0 (tracing modules).

May 2026

• New — Data Masking. Detect and mask PII in outbound LLM calls, inputs, and traces, with per-entity controls. See Data Masking.
• Improved — Agent Triggers (formerly Webhook Triggers) now cover six sources: generic webhook, Slack, Telegram, Microsoft Teams, WhatsApp, and schedule. See Agent Triggers.
• New — Virtual Filesystem. A per-agent filesystem for reading and writing files across an agent's runs. See Virtual Filesystem.
• New — Evaluations. A quality-operations cockpit: eval sets, eval runs, LLM-as-judge scoring, and quality gates. See Evaluations.
• New — Apps canvas. Rebuilt the Agent UI app builder on a Retool-style canvas — toolbox, free-placement grid, inspector, data queries, app version history, record storage, and AI-assisted widget creation. See Agent UI Deployments.
• New — Global Assistant panel and UI MCP. A workspace information-architecture refresh that puts the PromptRails Assistant in a panel available across the workspace, backed by a UI MCP surface.
• Improved — Embeddings providers. Embeddings now fall back across Fireworks, OpenAI, and Gemini.
• SDKs: Python, JavaScript, and Go v0.4.0 (Agent Triggers + Virtual Filesystem).

April 2026

• New — PromptRails Assistant. A built-in, AI-powered assistant for managing your workspace — creating and editing agents, prompts, and resources through natural language.
• New — Gateway service. An OpenAI-compatible gateway for LLM model reselling.
• New — Bulk model management. Export, import, and table-edit LLM models in bulk. See Prompts.
• Improved — Integrations catalog expanded to 29+ providers and 430+ tools, including Twilio, SendGrid, Mailchimp, Intercom, ClickUp, Tavily, Firecrawl, PostHog, Datadog, PagerDuty, and more. See Integrations.
• SDKs: Python, JavaScript, and Go v0.3.0.

March 2026

• New — Integration service. A dedicated integrations layer with 27 providers (168 tools) plus database templates and an integration tool type. See Integrations.
• New — Workspace Studio. Multi-tab editing for agents, prompts, runs, and traces, with MCP templates. See Agents and Prompts.
• New — Media generation. Image, speech, and video generation across multiple providers, with asset storage. See Assets and Media.
• New — Open-source engine packages. Internal providers replaced with the open-source LangRails, MediaRails, GuardRails, and MemoryRails packages.
• New — Agent UI dashboards. The first multi-page dashboard builder for deploying agent-facing UIs.
• New — Official SDKs. First public releases of the Python, JavaScript/TypeScript, and Go SDKs.

February 2026

• PromptRails goes live. Public launch of the PromptRails platform — agent orchestration, prompt management, and LLM gateway in one place. See the Quickstart to get started.