MCP 服务器

mcp-usercall

Run real user interviews from AI agents and retrieve structured insights with themes and verbatim quotes.

README

Usercall MCP - AI agents that run real user interviews

AI can build products. But it still doesn't talk to users.

Usercall MCP lets AI agents run user interviews via voice calls and return structured insights with themes and verbatim quotes.

Works with Claude Desktop, Cursor, and any MCP-compatible client.

Why this exists

AI agents can now build and ship products extremely quickly.

But most agents still rely on synthetic feedback or assumptions about users.

Usercall MCP lets agents gather real qualitative feedback directly from users.

Example workflow

Agent: "Why are users confused about onboarding?"

→ create_study
→ share interview_link with users
→ get_study_results

The returned interview_link can be shared with participants through email, Slack, Discord, or in-product prompts.

Example result:

{
  "themes": [
    {
      "name": "Onboarding confusion",
      "summary": "Users struggled to understand the second step.",
      "quotes": [
        "I wasn't sure what the app was asking me to do.",
        "I didn't know I had to verify my email before continuing."
      ]
    },
    {
      "name": "Pricing confusion",
      "summary": "Free plan limits were not clearly communicated.",
      "quotes": ["I wasn't sure if the free plan included analytics."]
    }
  ]
}

How it works

AI Agent

↓

Usercall MCP

↓

Usercall Agent API

↓

Real user interviews

↓

Themes and verbatim quotes returned to the agent

Try it in 60 seconds

1. Get an API key

2. Add to your MCP client

Claude Desktop (~/Library/Application Support/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "usercall": {
      "command": "npx",
      "args": ["-y", "@usercall/mcp"],
      "env": {
        "USERCALL_API_KEY": "your_key_here"
      }
    }
  }
}

Cursor (.cursor/mcp.json):

{
  "mcpServers": {
    "usercall": {
      "command": "npx",
      "args": ["-y", "@usercall/mcp"],
      "env": {
        "USERCALL_API_KEY": "your_key_here"
      }
    }
  }
}

Restart your MCP client.

3. Ask your agent

Run user interviews to understand why users drop off during onboarding.

Context:
- B2B SaaS product
- 3-step signup flow

Goal:
Identify confusion points and friction.

Target interviews: 5

Show participants this prototype during the interview:
https://www.figma.com/proto/abcd1234/onboarding-flow

The agent will:

create a study
return an interview link
collect responses
return themes and verbatim quotes

Structured tool example

Equivalent create_study tool call:

create_study
key_research_goal: "Understand why users drop off during onboarding"
business_context: "B2B SaaS signup flow"
target_interviews: 5
language: "en"

study_media:
  type: "prototype"
  url: "https://www.figma.com/proto/abcd1234/onboarding-flow"
  description: "New onboarding flow concept"

Tools

`create_study`

Creates an interview study and returns an interview_link to share with participants.

Field	Type	Required
`key_research_goal`	string	yes
`business_context`	string	yes
`additional_context_prompt`	string	no
`target_interviews`	number	no
`language`	`auto \| en \| ko`	no
`duration_minutes`	number	no
`metadata`	object	no
`study_media`	object	no

study_media (optional) — visual stimulus shown during all interview questions:

Field	Type	Required
`type`	`image \| prototype`	yes
`url`	string (URL)	yes
`description`	string (max 500 chars)	no

image: Direct image URL (.png, .jpg, .gif, .webp)
prototype: Figma prototype URL (converted to interactive embed)
Media is only visible to web participants; phone callers won't see it

`update_study`

Updates an existing study. Use this to increase interview slots, add/update media, or disable the link.

Field	Type	Required
`study_id`	uuid string	yes
`target_interviews`	number	no
`is_link_disabled`	boolean	no
`study_media`	object	no

The study_media object follows the same schema as in create_study.

`get_study_status`

Returns the current lifecycle status of a study.

Field	Type
`study_id`	uuid string

Status values: running · analyzing · complete

Response includes interview progress fields, including completed_interviews and target_interviews.

`get_study_results`

Returns analysis output once the study is complete.

Field	Type	Required
`study_id`	uuid string	yes
`format`	`summary \| full`	no

Summary/full responses include study progress fields and analysis output.

`delete_study`

Permanently deletes a study and all associated data (recordings, transcripts). Releases unused reserved credits.

Field	Type	Required
`study_id`	uuid string	yes

Example workflow

1. create_study
   key_research_goal: "Why do users drop off during onboarding?"
   business_context: "B2B SaaS, 3-step signup flow"

   → returns { study_id, interview_link }

2. Share interview_link with participants
   (email, Slack, in-product prompt, etc.)

3. get_study_status
   → "analyzing"

4. get_study_results
   → themes + verbatim quotes returned to the agent

With visual stimulus

1. create_study
   key_research_goal: "Get feedback on new dashboard design"
   business_context: "Redesigning analytics dashboard for power users"
   study_media:
     type: "image"
     url: "https://example.com/dashboard-mockup.png"
     description: "New dashboard design concept"

   → returns { study_id, interview_link }

2. Share interview_link — participants see the mockup during interview

For Figma prototypes, use type: "prototype" with a Figma proto URL.

Requirements

Node.js 18+
A valid Usercall API key

Self-hosting / development

pnpm install
pnpm build
USERCALL_API_KEY="your_key_here" pnpm start

Smoke test:

USERCALL_API_KEY="your_key_here" pnpm smoke

Troubleshooting

Error	Fix
`Missing USERCALL_API_KEY`	Set the env var before starting
`401 Unauthorized`	Invalid or revoked API key
`402 Insufficient credits`	Add credits at app.usercall.co
`500` on create	Verify your key has access to Agent API v1