When AI agents / software
need a human in payments

→Drop in an HTTP Request node

# n8n: HTTP Request node

Method   POST
URL      your M91 send link
Body     {{ $json.summary }}

Branch on what they tapped.

→Use Webhooks by Zapier as an action

# Zapier: Webhooks by Zapier → POST

URL      your M91 send link
Data     title = Lead replied

Any Zap can now reach a person
on their phone.

→Add the HTTP → Make a request module

# Make: HTTP → Make a request

Method   POST
URL      your M91 send link
Body     JSON from the previous module

→Paste the setup prompt into Claude Code

# Claude Code, Claude Desktop

Before a risky step, Claude sends
the alert and waits.

The person approves or rejects on
their phone, and Claude carries on
with the answer.

→Paste the same setup prompt into any coding agent

# Codex, Cursor, Windsurf, Gemini CLI

The prompt points the agent at
m91-api.msg91.com/llms.txt.

It reads the docs, asks you for
your send link and wires it in.

→Add a node before the risky step

# LangGraph: a node in your graph
graph.add_node("ask_human", ask_human)

def ask_human(question: str) -> str:
    r = requests.post(
        M91_SEND_LINK,
        json={"title": question},
    )
    return r.text

→Give the agent an ask_human tool

# Deep Agents
# create_deep_agent(tools=[ask_human])

def ask_human(question: str) -> str:
    r = requests.post(
        M91_SEND_LINK,
        json={"title": question},
    )
    return r.text

→Register it with @agent.tool_plain

@agent.tool_plain
def ask_human(question: str) -> str:
    r = requests.post(
        M91_SEND_LINK,
        json={"title": question},
    )
    return r.text

→Wrap it in @function_tool

@function_tool
def ask_human(question: str) -> str:
    r = requests.post(
        M91_SEND_LINK,
        json={"title": question},
    )
    return r.text

→Expose it as a custom tool

# Claude Agent SDK: a custom tool

def ask_human(question: str) -> str:
    r = requests.post(
        M91_SEND_LINK,
        json={"title": question},
    )
    return r.text

→Pass it in the agent’s tools list

# Google ADK
# Agent(..., tools=[ask_human])

def ask_human(question: str) -> str:
    r = requests.post(
        M91_SEND_LINK,
        json={"title": question},
    )
    return r.text

→Decorate it with @tool

@tool("Ask a human")
def ask_human(question: str) -> str:
    r = requests.post(
        M91_SEND_LINK,
        json={"title": question},
    )
    return r.text

→Define it with tool()

const askHuman = tool({
  description: "Ask a person first",
  execute: async ({ question }) => {
    const r = await fetch(
      M91_SEND_LINK,
      {
        method: "POST",
        body: JSON.stringify({
          title: question,
        }),
      },
    );
    return r.text();
  },
});

→Define it with createTool()

const askHuman = createTool({
  id: "ask-human",
  execute: async ({ question }) => {
    const r = await fetch(
      M91_SEND_LINK,
      {
        method: "POST",
        body: JSON.stringify({
          title: question,
        }),
      },
    );
    return r.text();
  },
});

→Call it from anything that speaks HTTP

$ curl -X POST \
    https://m91-api.msg91.com/s/sk_… \
    -d '{"title":"Payments down"}'

# Monitors, CRMs, cron jobs,
# your own code.