Connect
Optimize
Secure
Live 47 Actions
Spark Hire MCP Server
for AI Agents
Connect your AI agent to StackOne's Spark Hire MCP server and give it 47 MCP tools out of the box. Auth, tool execution, and security all managed.
Spark Hire MCP Server
Built by 
StackOne
StackOne 
Coverage
47 Agent Actions
Create, read, update, and delete across Spark Hire — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your Spark Hire MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every Spark Hire tool response scanned for prompt injection in milliseconds — 88.7% accuracy, all running on CPU.
Prompt Injection Defense →
Performance
Max Agent Context. Min Cost.
Free up to 96% of your agent's context window to enhance reasoning and reduce cost, on every Spark Hire call.
Tools Discovery →What is the Spark Hire MCP Server?
A Spark Hire MCP server lets AI agents read and write Spark Hire data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Spark Hire MCP server ships with 47 pre-built actions, fully extensible via the Connector Builder — plus managed authentication, prompt injection defense, observability, and agent execution runtime. Connect it from MCP clients like Claude Desktop, Claude Code, Cursor, Goose, and VS Code, or from agent frameworks like OpenAI Agents SDK, LangChain, and Vercel AI SDK.
All Spark Hire MCP Tools
Every action from Spark Hire's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
A Candidate Assessment Items
- Create A Candidate Assessment Item
Create a candidate assessment item
- Delete A Candidate Assessment Item
Delete a candidate assessment item
A Jobs
- Create A Job
Create a job
- Retrieve A Job
Retrieve a job
- Update A Job
Update a job
- Delete A Job
Delete a job
A Job Assessments
- Create A Job Assessment
Create a job assessment
- Retrieve A Job Assessment
Retrieve a job assessment
- Update A Job Assessment
Update a job assessment
- Delete A Job Assessment
Delete a job assessment
A Job Assessment Links
- Create A Job Assessment Link
Create a job assessment link
- Retrieve A Job Assessment Link
Retrieve a job assessment link
- Update A Job Assessment Link
Update a job assessment link
Share Links
- List Share Links
List share links
- Get Share Link
Retrieve a share link
- Update Share Link
Update a share link
- Batch Delete Share Links
Batch delete share links
- Delete Share Link
Delete a share link
Interview Share Links
- Create Interview Share Link
Create an interview share link
- List Interview Share Links
Retrieve an interview share link
- Update Interview Share Link
Update an interview share link
- Delete Interview Share Link
Delete an interview share link
Question Sets
- List Question Sets
List question sets
- Get Question Set
Show a question set
Behavioral Profiles
- List Behavioral Profiles
List behavioral profiles
- Get Behavioral Profile
Retrieve a behavioral profile
Reference Check Surveys
- List Reference Check Surveys
List reference check surveys
- Get Reference Check Survey
Retrieve a reference check survey
Other (19)
- Create Advanced Share Links
Create advanced share links
- Add Interviews To Share Link
Add interviews to a share link
- Add Or Remove Interview On Multiple Share Links
Add or remove an interview on multiple advanced share links
- List Assessment Items
List assessment items
- Get A Predictive Assessment Report
Get a predictive assessment report
- List Jobs
List jobs
- List Job Assessments
List job assessments
- Get OAuth Client
Get authenticated partner client info
- Batch Cancel Candidate Assessment Items
Batch cancel candidate assessment items
- Batch Reschedule Candidate Assessment Items
Batch reschedule candidate assessment items
- Remove Interviews From Share Link
Remove interviews from a share link
- Show A Candidate Assessment Item
Show a candidate assessment item
- Cancel A Candidate Assessment Item
Cancel a candidate assessment item
- Reschedule A Candidate Assessment Item
Reschedule a candidate assessment item
- Activate A Job
Activate a job
- Deactivate A Job
Deactivate a job
- Activate A Job Assessment Link
Activate a job assessment link
- Deactivate A Job Assessment Link
Deactivate a job assessment link
- Destroy A Job Assessment Link
Destroy a job assessment link
Spark Hire AI Agent Use Cases
Connect your AI agent to Spark Hire and help your team scale the recruiting operations they run by hand today.
Job Posting Distribution
Use StackOne to connect your AI agent to your ATS and job boards to automate job posting distribution.
View Reference Check Automation
Use StackOne to connect your AI agent to your ATS, survey tools, and messaging systems to automate reference checks.
View Offer Letter Generation
Use StackOne to connect your AI agent to your ATS, HRIS, and document management tools to automate offer letter generation.
ViewSet Up Your Spark Hire MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to Spark Hire in under 10 lines of code.
Agent Frameworks
JSON{
"mcpServers": {
"stackone": {
"command": "npx",
"args": [
"-y",
"mcp-remote@latest",
"https://api.stackone.com/mcp?x-account-id=<account_id>",
"--header",
"Authorization: Basic <YOUR_BASE64_TOKEN>"
]
}
}
}Platform Resources
MCP Code Mode: Keeping Tool Responses Out of Agent Context
Anthropic's code_execution processes data already in context. Custom MCP code mode keeps raw tool responses in a sandbox. 14K tokens vs 500.
11 min
Comparing BM25, TF-IDF, and Hybrid Search for MCP Tool Discovery
Benchmarking BM25, TF-IDF, and hybrid search for MCP tool discovery across 916 tools. The 80/20 TF-IDF/BM25 hybrid hits 21% Top-1 accuracy in under 1ms.
10 min
Indirect Prompt Injection Defense for MCP Tools: A Technical Guide
MCP tools that read emails, CRM records, and tickets are indirect prompt injection vectors. Here's how we built a two-tier defense that scans tool results in ~11ms.
12 min
MCP vs A2A: Architecture, Security, and When to Use Each
MCP vs A2A: what each protocol standardizes, how they differ, their shared security risks including indirect prompt injection, and when to use one, both, or a hybrid architecture.
12 min
MCP vs API: What 200+ Connector Builds Taught Us
MCP wraps APIs, it doesn't replace them. After building 200+ connectors that serve both, here's when each approach wins.
14 min read
Spark Hire MCP Server FAQ
Does StackOne have a Spark Hire MCP server?
Yes. StackOne offers a hosted Spark Hire MCP server with 47 pre-built actions, and every action is tested and QA'd by StackOne. Connect it to Claude, Cursor, and any other MCP client, or to any agent framework through the AI Action SDK. It ships with managed agent authentication, prompt injection defense, and tool discovery with server-side execution that preserve your agent's context window and keep reasoning performance.
Spark Hire MCP server vs direct API integration — what's the difference?
A Spark Hire MCP server and direct API integration serve different use cases. Direct API integration is for software-to-software — backend code calling Spark Hire. A Spark Hire MCP server is for AI agents — MCP clients like Claude and Cursor, plus framework agents built with OpenAI, LangChain, or Vercel AI — discovering and calling Spark Hire at runtime. StackOne provides both.
How does Spark Hire authentication work for AI agents?
Spark Hire authentication for AI agents works through a StackOne Connect Session. Create one via the dashboard or the SDK — you get an auth link and ready-to-paste config for Claude Desktop, Cursor, and other MCP clients. Your user authenticates their own Spark Hire account; StackOne handles token exchange, storage, and refresh. Credentials never reach the LLM, and each user is isolated via
origin_owner_id.Are Spark Hire MCP tools vulnerable to prompt injection?
Yes — Spark Hire MCP tools can be vulnerable to indirect prompt injection. Any tool that reads user-written content — documents, messages, tickets, records, or free-text fields — is a potential vector. StackOne Defender scans every tool response before it enters the agent's context — regex patterns in ~1ms, then a MiniLM classifier in ~4ms. 88.7% accuracy, CPU-only.
What is the context bloat of a Spark Hire agent and how do I avoid it?
Context bloat happens when Spark Hire tool schemas and API responses eat your Spark Hire agent's memory, preventing it from reasoning effectively. A single Spark Hire query can return a massive JSON response, and connecting multiple tools compounds the problem. Tools Discovery and Code Mode reduce context bloat — loading only relevant tools per query and keeping raw responses out of the agent's context.
Can I limit which actions my Spark Hire agent can access?
Yes — you can limit which actions your Spark Hire agent can access directly from the StackOne dashboard. Toggle actions on or off, or restrict them to specific accounts, with no code changes to your agent. Session tokens can be scoped to exact actions so if one leaks, exposure stays contained.
Can I create custom agent actions for my Spark Hire MCP server?
Yes — you can create custom agent actions for your Spark Hire MCP server using Connector Builder. It's an integration agent your coding assistant (Claude Code, Cursor, or Copilot) can invoke to research Spark Hire's API, generate production-ready connector YAML, test against the live API, and validate before you ship.
When should I NOT use a Spark Hire MCP server?
Skip a Spark Hire MCP server if your integration is purely software-to-software — direct Spark Hire API integration is simpler when no AI agent is involved. For deterministic, compliance-critical operations (financial transactions, regulatory reporting), direct API gives you predictable behavior without agent-driven decision-making. MCP shines when AI agents need to dynamically discover and call Spark Hire actions at runtime.
What AI frameworks and AI clients does the StackOne Spark Hire MCP server support?
The StackOne Spark Hire MCP server supports both. MCP clients (paste-and-go apps): Claude Desktop, Claude Code, Cursor, VS Code, Goose. Agent frameworks (code SDKs you build with): OpenAI Agents SDK, Anthropic, Vercel AI, Google ADK, CrewAI, Pydantic AI, LangChain, LangGraph, Azure AI Foundry.
Put your AI agents to work
All the tools you need to build and scale AI agent integrations, with best-in-class connectivity, execution, and security.