applications_list
List applications available to the current user.
LABSCO SUMMARY
From the crash to the release that caused it, in one thread.
The deployment tools are what make this more than an error viewer: an assistant can pull the newest release with its error analysis attached, then walk into the specific error group's stack trace — which is the actual shape of a post-release investigation.
What it is
A remote MCP server run by Raygun that connects an AI assistant to your Crash Reporting, Real User Monitoring and APM data. Raygun hosts it at https://api.raygun.com/v3/mcp, so there is no package or local server to install — you add the URL to your client and sign in.
What you get
- Errors —
error_groups_list,error_groups_searchacross messages, stack traces, URLs, versions, tags and affected users,error_group_investigatefor the full picture,error_group_update_statusto resolve, ignore or reactivate,error_group_add_commentanderror_group_read_commentsfor investigation notes,error_group_instances_listanderror_instance_getfor the stack trace and context of one occurrence - Deployments —
deployments_list,deployment_get_latestwith its related error groups,deployment_investigate,deployment_createanddeployment_manage - Backend performance (APM) —
apm_hotspots_searchto rank slow methods, database queries and external calls,apm_issues_searchfor recurring problems such as N+1 queries,apm_issue_investigate,apm_traces_searchandapm_trace_investigatefor one request's significant calls - Applications —
applications_list,applications_search,application_get_details,application_regenerate_api_key - Customers and sessions —
customers_searchby name, email or identifier,customer_investigatefor a profile with their recent errors and sessions,sessions_listwith environment and device data,session_investigatefor one session's errors and page journey - Page performance —
pages_list,page_investigate,metrics_website_performance_analyzefor trends,metrics_performance_distribution_analyzefor variability,metrics_error_trends_analyzefor error rates - Team —
invitations_manage,invitation_send,invitation_revoke
Requirements
A Raygun account with an active subscription. Clients with MCP OAuth, including Claude Code, Codex, Cursor, VS Code and Zed, open Raygun in your browser to sign in, so there is no token to create; the others send a personal access token from app.raygun.com/user/tokens as an Authorization: Bearer header. Tools that change data (error statuses, deployments, comments, invitations, ingestion API keys) follow the scopes you approve, so grant only what you need.
Setup effort
One command, then sign in — claude mcp add --transport http raygun https://api.raygun.com/v3/mcp, then approve the OAuth sign-in
USE CASES
01
Working out what a release broke
Get the latest deployment with its related error groups, then investigate the ones that appeared with it.
02
Finding an error from a symptom
Search occurrences by message, stack trace, URL, version, tag or affected user when you don't know which group it is.
03
Fixing an error with the real stack trace
List the group's occurrences and pull one in full — exception, request context, environment and breadcrumbs — so the fix is made against the actual failure.
04
Closing the loop on an investigation
Read the notes already on the group, add what you found, then move it to resolved or ignored.
05
Finding what slows the backend down
Rank the slowest methods, database queries and external calls, then open a recurring issue and one of its traces to see where the time went.
06
Answering a customer who reported a problem
Search for them, read their profile with recent errors and sessions, then open a session to see its environment, errors and page journey.
07
Seeing whether the site got slower
Analyse performance trends for the top pages, and check the distribution when the average hides the problem.
08
Checking whether errors are trending up
Track error counts, affected users and affected sessions over time rather than eyeballing the dashboard.
34 tools
Listed in project docs. Your client may show a different list.
applications_search
Find applications by name.
application_get_details
Get an application's product-data status and plan information, optionally including its ingestion API key.
application_regenerate_api_key
Rotate an application's ingestion API key. The previous key stops working immediately.
error_groups_list
List error-group metadata for an application.
error_groups_search
Search indexed occurrences across messages, exception types, stack traces, URLs, hosts, versions, tags, custom data, breadcrumbs, machines, and affected users.
error_group_investigate
Inspect an error group and its latest occurrence, including typed error or CSP violation details and request context.
error_group_instances_list
List occurrence identifiers and timestamps for an error group.
error_instance_get
Get full typed details for one occurrence, including its exception graph or CSP violation, request context, environment, and breadcrumbs.
error_group_update_status
Activate, resolve, ignore, or permanently ignore an error group.
error_group_add_comment
Add an investigation or collaboration note to an error group.
error_group_read_comments
Read existing comments on an error group.
apm_issues_search
Find recurring performance issues and anti-patterns such as slow methods, slow queries, chatty APIs, and N+1 queries.
apm_issue_investigate
Inspect an APM issue's metric, percentiles, and recent affected traces.
apm_traces_search
Find traces by time, request text, duration, or status code.
apm_trace_investigate
Inspect a trace's summary, profiler threads, linked issues, and most significant calls.
apm_hotspots_search
Rank methods, database queries, or external calls by average duration, total duration, or call count.
deployments_list
Browse deployment history for an application.
deployment_get_latest
Get the most recent deployment and its related error groups.
deployment_investigate
Inspect a deployment and errors associated with that release.
deployment_create
Record a deployment using an application identifier or ingestion API key.
deployment_manage
Update deployment metadata or delete an incorrectly created deployment.
customers_search
Find customers by name, email address, or external identifier.
customer_investigate
Get a customer profile, recent error groups, and recent sessions. Use the internal identifier returned by customers_search.
sessions_list
List sessions with timing, location, browser, operating system, viewport, and deployment information.
session_investigate
Inspect a session's environment, errors, and page-view journey.
pages_list
List monitored pages for use in session and performance queries.
page_investigate
Get a page's identifier, URL or name, type, and last-seen time.
metrics_website_performance_analyze
Analyze page performance as a time series using average, median, p95, or p99 aggregation.
metrics_performance_distribution_analyze
Analyze performance as histogram buckets to understand user-experience distribution and outliers.
metrics_error_trends_analyze
Analyze error counts, affected users, and affected sessions over time.
invitations_manage
List and review team invitations.
invitation_send
Invite a user and grant access to selected applications.
invitation_revoke
Revoke a pending invitation.
BEFORE YOU INSTALL
What to know first
Tools you get
34 tools named in the project's documentation.
Requires
- A Raygun account with an active subscription
- an MCP client that supports remote Streamable HTTP servers
INSTALLATION
Connect your client
Server setup
claude mcp add
TERMINAL
claude mcp add --transport http raygun https://api.raygun.com/v3/mcpHosted endpoint
ENDPOINT URL
https://api.raygun.com/v3/mcpAdd this hosted endpoint to your MCP client, then sign in.
MCP Clients
Claude Code — OAuth
CLAUDE CODE — OAUTH · TERMINAL
claude mcp add --transport http raygun https://api.raygun.com/v3/mcpNo token: run /mcp in Claude Code and follow the browser sign-in, where you pick a Raygun plan and approve the permissions.
Raygun hosts and updates this server at https://api.raygun.com/v3/mcp, so there is no package or local server to install.
Claude Code — token
CLAUDE CODE — TOKEN · TERMINAL
claude mcp add --transport http raygun https://api.raygun.com/v3/mcp --header "Authorization: Bearer <YOUR_PAT_TOKEN>"<YOUR_PAT_TOKEN> is a Raygun personal access token. At app.raygun.com/user/tokens, click Create New Token, choose its permissions and copy it.
Raygun hosts and updates this server at https://api.raygun.com/v3/mcp, so there is no package or local server to install.
Cursor — OAuth
CURSOR — OAUTH · JSON
{
"mcpServers": {
"raygun": {
"url": "https://api.raygun.com/v3/mcp"
}
}
}No token: Cursor prompts you to sign in to Raygun when it connects.
Raygun hosts and updates this server at https://api.raygun.com/v3/mcp, so there is no package or local server to install.
Cursor — token, JetBrains IDEs
JSON
{
"mcpServers": {
"raygun": {
"url": "https://api.raygun.com/v3/mcp",
"headers": {
"Authorization": "Bearer <YOUR_PAT_TOKEN>"
}
}
}
}<YOUR_PAT_TOKEN> is a Raygun personal access token. At app.raygun.com/user/tokens, click Create New Token, choose its permissions and copy it.
Raygun hosts and updates this server at https://api.raygun.com/v3/mcp, so there is no package or local server to install.
VS Code — OAuth
VS CODE — OAUTH · JSON
{
"servers": {
"raygun": {
"type": "http",
"url": "https://api.raygun.com/v3/mcp"
}
}
}No token: VS Code prompts you to sign in to Raygun when it connects.
Raygun hosts and updates this server at https://api.raygun.com/v3/mcp, so there is no package or local server to install.
VS Code — token
VS CODE — TOKEN · JSON
{
"servers": {
"raygun": {
"type": "http",
"url": "https://api.raygun.com/v3/mcp",
"headers": {
"Authorization": "Bearer <YOUR_PAT_TOKEN>"
}
}
}
}<YOUR_PAT_TOKEN> is a Raygun personal access token. At app.raygun.com/user/tokens, click Create New Token, choose its permissions and copy it.
Raygun hosts and updates this server at https://api.raygun.com/v3/mcp, so there is no package or local server to install.
Codex — OAuth
CODEX — OAUTH · TERMINAL
codex mcp add raygun --url https://api.raygun.com/v3/mcp
codex mcp login raygunNo token: codex mcp login opens the Raygun sign-in. The Codex CLI, the Codex IDE extension and the ChatGPT desktop app on the same machine share this configuration.
Raygun hosts and updates this server at https://api.raygun.com/v3/mcp, so there is no package or local server to install.
Codex — token
Set the RAYGUN_PAT environment variable to your Raygun personal access token, then add the server:
CODEX — TOKEN · TERMINAL
codex mcp add raygun --url https://api.raygun.com/v3/mcp --bearer-token-env-var RAYGUN_PATCreate the token at app.raygun.com/user/tokens: click Create New Token, choose its permissions and copy it.
Raygun hosts and updates this server at https://api.raygun.com/v3/mcp, so there is no package or local server to install.
Zed — OAuth
ZED — OAUTH · JSON
{
"context_servers": {
"raygun": {
"url": "https://api.raygun.com/v3/mcp"
}
}
}No token: with no Authorization header, Zed prompts you to sign in to Raygun through the MCP OAuth flow.
Raygun hosts and updates this server at https://api.raygun.com/v3/mcp, so there is no package or local server to install.
Zed — token
ZED — TOKEN · JSON
{
"context_servers": {
"raygun": {
"url": "https://api.raygun.com/v3/mcp",
"headers": {
"Authorization": "Bearer <YOUR_PAT_TOKEN>"
}
}
}
}<YOUR_PAT_TOKEN> is a Raygun personal access token. At app.raygun.com/user/tokens, click Create New Token, choose its permissions and copy it.
Raygun hosts and updates this server at https://api.raygun.com/v3/mcp, so there is no package or local server to install.
Amp
AMP · TERMINAL
amp mcp add raygun --header "Authorization=Bearer <YOUR_PAT_TOKEN>" https://api.raygun.com/v3/mcp<YOUR_PAT_TOKEN> is a Raygun personal access token. At app.raygun.com/user/tokens, click Create New Token, choose its permissions and copy it.
Raygun hosts and updates this server at https://api.raygun.com/v3/mcp, so there is no package or local server to install.
Gemini CLI
GEMINI CLI · TERMINAL
gemini mcp add --transport http raygun https://api.raygun.com/v3/mcp --header "Authorization: Bearer <YOUR_PAT_TOKEN>"<YOUR_PAT_TOKEN> is a Raygun personal access token. At app.raygun.com/user/tokens, click Create New Token, choose its permissions and copy it.
Raygun hosts and updates this server at https://api.raygun.com/v3/mcp, so there is no package or local server to install.
