TheirStack for AI agents
TheirStack tracks job postings and company technology data, used by sales and recruiting teams to spot companies that are hiring for, or already using, specific tools. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.
What agents do in TheirStack.
Search jobs by keyword and location
Find job postings matching a technology, role, or location for prospecting.
Search companies by technology
Look up which companies use a specific tool, a read-only signal for outbound targeting.
Check credit balance before a search
Read remaining credits before running a broad company or job search that consumes them.
10 TheirStack actions, graded by risk.
Every TheirStack action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.
read
10Look things up. Allowed by default.
- theirstack.search_jobsSearch Jobs
- theirstack.list_datasetsList Datasets
- theirstack.search_keywordsSearch Keywords
- theirstack.search_companiesSearch Companies
- theirstack.search_locationsSearch Locations
- theirstack.search_industriesSearch Industries
- theirstack.get_credit_balanceGet Credit Balance
- theirstack.list_company_listsList Company Lists
- theirstack.list_saved_searchesList Saved Searches
- theirstack.get_credit_consumptionGet Credit Consumption
write
0Create and change things. Allow, or ask the user first.
- No write actions.
destructive
0Delete, cancel or archive. Ask first, or deny outright.
- No destructive actions.
TheirStack in three steps.
- 01Your users connect TheirStackThey add their TheirStack api key on Arc0 Connect, under your brand. It goes straight into the vault.
- 02You set the rulesReads run, and writes like “updates” can wait for the user to approve.
- 03Any agent can actYour agent calls TheirStack through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
await arc0.policies.set('theirstack', { read: 'allow', write: 'ask', destructive: 'deny', }) # Claude Code: the same connection, one URL $ claude mcp add --transport http arc0 \ https://mcp.arc0.ai/u/u_8f2
How TheirStack connects.
Users add their TheirStack api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.
The same TheirStack connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →
- AUTH
- API key
- CREDENTIALS
- Per-tenant encrypted vault
- MODEL SEES
- Results only, never credentials
- AUDIT LOG
- Every call, on every plan
Use TheirStack from any agent.
ClaudeChatGPTCursor
Codex
VS CodeOpenAI Agents SDKClaude Agent SDK
Vercel AI SDK
Mastra
LangGraph
TheirStack and Arc0, answered.
Can I use TheirStack with Claude, ChatGPT or Cursor?
Yes. Connect TheirStack to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the TheirStack actions you allow.
How do users connect TheirStack?
Users add their TheirStack api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.
Which TheirStack actions can my agent take?
10 in total: 10 read, 0 write and 0 destructive. Your policies decide which of them each agent may call.
Can I make my agent read-only in TheirStack?
Yes. Allow read actions and deny writes in the TheirStack policy. Your agent can still look things up, and any write it attempts is blocked and logged.
Can my own backend call TheirStack too?
Yes. The same TheirStack connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.
Plug TheirStack into your agent.
Your users connect TheirStack once, under your brand. Your agent gets 10 actions behind your policies, with every call on the record.
Free to build · MCP + REST · Audit log on every plan