Join early accessPoint the Messages API's MCP connector at Pink; Claude calls the payment tools server-side. Works with Agents you build on the Claude API, with no MCP client of your own. Plans: Any API account; MCP connector beta header.
What you get
Once connected, Anthropic Messages API can see its budget, the payees it may pay and the rules that apply, run a dry run, request a payment and file the receipt. The rules you set in Pink decide each request: allowed on the spot, sent to a person on the phone, or blocked. Anthropic Messages API never holds a card number or a bank login.
mcp_servers array with Pink's URL and the agent key as authorization_token, and the beta header anthropic-beta: mcp-client-2025-11-20. Claude discovers the seven tools and calls them during the turn.pending_human decision carries a hold_id; call again later with pink.get_credential or poll GET /v1/payments/{id} from your code.
curl https://api.anthropic.com/v1/messages \
-H "x-api-key: $ANTHROPIC_API_KEY" -H "anthropic-version: 2023-06-01" \
-H "anthropic-beta: mcp-client-2025-11-20" -H "content-type: application/json" -d '{
"model": "claude-sonnet-5", "max_tokens": 2000,
"mcp_servers": [{ "type": "url", "url": "https://agentic-sandbox.pinkwallet.com/mcp", "name": "pink", "authorization_token": "<agent_key>" }],
"messages": [{ "role": "user", "content": "Reorder 20 kg of espresso beans from Counter Culture Coffee for $420. Check the policy first." }]
}'Replace <agent_key> with the key of the agent this api should act as. Each agent has its own key, budget and rules.
“Check my budget with Pink, then order 20 kg of espresso beans from Counter Culture Coffee for $420. After that, order $890 of weekly supplies from Sysco.”
What you will see
The first order is allowed on the spot and the agent receives a single-use test credential. The second stops at the store manager's rule ($500–$2,000): it shows up under Approvals in the console, and the agent waits for a person. Approve it there and the agent picks up the credential.
Why those two rules exist →
The API connector takes a pre-acquired token; it does not run a browser sign-in. An agent key is exactly that: a token for one agent.
Yes, with the tool configuration in the request; for example allow only pink.check_policy for a read-only planning agent.
Menu names and settings paths follow each vendor's documentation at the verified date. If a vendor moves a menu, the linked page is the source of truth; the Pink side does not change.
Contact Email: [email protected]
ALTIVOX SPHERE SPÓŁKA ZO.O. is a wholly owned subsidiary of PinkWallet, registered in Poland in the Polish Ministry of Finance's virtual-currency activity register (registration number: RDWW-1797), authorized to provide cryptocurrency exchange and digital asset custody services in the EU under AML/CTF regulations.
PinkWallet (Pink Technologies Inc) is registered as a Money Services Business with the U.S. Department of the Treasury, FinCEN (Registration No. 31000321450011), enabling it to provide users with cross-border fund settlement and international payment services under the U.S. regulatory framework.
PinkWallet (Pink Wallet Technology Inc.) is registered as a Money Services Business with FINTRAC, Canada's financial intelligence unit (Registration No. C100001073), enabling it to provide users with cross-border fund settlement and virtual currency services under the Canadian regulatory framework.
