Typeform Integration

Receive and route Typeform webhooks for form responses.

Setup

1. Create a Source in Hookbase

curl -X POST https://api.hookbase.app/api/sources \
  -H "Authorization: Bearer whr_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Typeform Production",
    "slug": "typeform",
    "provider": "typeform",
    "signingSecret": "your-typeform-webhook-secret"
  }'

Save your webhook URL:

https://api.hookbase.app/ingest/{orgSlug}/typeform

2. Create the Typeform Webhook

Typeform webhooks are configured per form, in that form's Connect → Webhooks panel.

Add a webhook and set its endpoint to your Hookbase ingest URL
Set the webhook's secret, and store the same value on your Hookbase source as signingSecret
Turn the webhook on

The secret is one you choose, not one Typeform generates, so it has to be typed into both places and match exactly. A webhook left without a secret sends no Typeform-Signature header at all, and a source that has a signingSecret configured treats a missing signature header as a failed verification rather than as "nothing to check".

Each form has its own webhook and its own secret. Routing two forms into one Hookbase source means only the form whose secret you stored will verify — use one source per form, or set the same secret on both webhooks.

See Typeform's webhook security guide for the signature scheme.

3. Create Destinations and Routes

# Create a destination
curl -X POST https://api.hookbase.app/api/destinations \
  -H "Authorization: Bearer whr_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{"name": "Response Store", "slug": "typeform-responses", "url": "https://api.myapp.com/webhooks/typeform"}'
 
# Create a route
curl -X POST https://api.hookbase.app/api/routes \
  -H "Authorization: Bearer whr_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{"name": "Typeform to Response Store", "sourceId": "src_...", "destinationId": "dst_..."}'

A route carries one destination. To fan the same responses out to two services, create two routes over the same source.

Signature Verification

Typeform signs the raw request body with HMAC-SHA256 and sends the base64 digest in the Typeform-Signature header behind a sha256= prefix:

Typeform-Signature: sha256=5FvJ9hOu/uBUWdR/v8EVsqM9TOpvrVo5g7dcyopOMkw=

Hookbase compares the header against its own base64 digest of the body with the prefix removed. The prefix is required: a bare digest in Typeform-Signature is treated as malformed rather than compared.

The secret is used exactly as you stored it — its UTF-8 bytes are the HMAC key. Nothing is stripped from it and nothing is base64-decoded first; only the digest is base64, not the key.

Hookbase verifies this automatically once the source has both fields set:

{
  "provider": "typeform",
  "signingSecret": "your-typeform-webhook-secret"
}

Warning

The sha256= prefix here carries base64, not hex. GitHub's X-Hub-Signature-256 uses a prefix that looks identical and carries a 64-character hex digest. Typeform's carries a 44-character base64 digest of the same 32 bytes, ending in =.

This is the detail that breaks manual verification. If you reproduce the signature the way you would for GitHub — hmac.hexdigest(), or -hex on the command line — you get a well-formed value that can never match, and the mismatch looks like a wrong secret. Take the digest as bytes and base64-encode it instead: in Python, base64 over hmac.new(secret, body, sha256).digest(); on the command line, openssl dgst -sha256 -hmac "$SECRET" -binary | base64.

There is nothing to configure for this. Hookbase already encodes Typeform's digest as base64 — the warning is for your own side of the comparison.

Info

Sign the raw body, not re-serialized JSON. The digest covers the exact bytes Typeform sent. Parsing the body and re-encoding it changes key order and whitespace, and the digest changes with it. Hookbase verifies against the raw body it received, before any transform runs.

Once you have confirmed events are arriving with signature_valid: true, set rejectInvalidSignatures: true on the source to have unverified requests refused with 401 instead of stored.

Common Events

Event	Description
`form_response`	A form response was submitted

Typeform's webhooks are response-centric: the event type is in event_type, and the submission itself is in form_response.

Form Response

{
  "event_id": "evt-abc123",
  "event_type": "form_response",
  "form_response": {
    "form_id": "frm_def456",
    "token": "resp-ghi789",
    "submitted_at": "2024-01-15T10:30:00Z",
    "landed_at": "2024-01-15T10:28:00Z",
    "definition": {
      "id": "frm_def456",
      "title": "Customer Feedback Survey",
      "fields": [
        { "id": "fld_001", "title": "How satisfied are you?", "type": "opinion_scale" },
        { "id": "fld_002", "title": "Any additional comments?", "type": "long_text" }
      ]
    },
    "answers": [
      { "field": { "id": "fld_001", "type": "opinion_scale" }, "type": "number", "number": 9 },
      { "field": { "id": "fld_002", "type": "long_text" }, "type": "text", "text": "Great product, love the new features!" }
    ]
  }
}

Transform Examples

A javascript transform receives the parsed payload and returns the body Hookbase delivers.

Flatten Answers into One Object

Each entry in answers names its value under a key matching its own type, so there is no single field to read. This picks the right one per answer and keys the result by field id.

function transform(payload) {
  const r = payload.form_response || {};
  const titles = {};
  ((r.definition && r.definition.fields) || []).forEach(f => { titles[f.id] = f.title; });
 
  const answers = {};
  (r.answers || []).forEach(a => {
    const id = a.field ? a.field.id : null;
    if (!id) return;
    // The value key is named after the answer's type: number, text, email, boolean, and so on.
    // choice/choices are objects, so keep them whole rather than guessing a label.
    const value = a[a.type];
    answers[id] = { question: titles[id] || null, value: value === undefined ? null : value };
  });
 
  return {
    event_id: payload.event_id,
    form_id: r.form_id || null,
    response_token: r.token || null,
    submitted_at: r.submitted_at || null,
    seconds_to_complete: r.landed_at && r.submitted_at
      ? Math.round((new Date(r.submitted_at) - new Date(r.landed_at)) / 1000)
      : null,
    answers: answers
  };
}

Slack Notification with the First Answer

function transform(payload) {
  const r = payload.form_response || {};
  const title = (r.definition && r.definition.title) || r.form_id || "form";
  const first = (r.answers || [])[0];
  const firstValue = first ? first[first.type] : null;
 
  return {
    text: `New response: ${title}`,
    blocks: [
      {
        type: "section",
        fields: [
          { type: "mrkdwn", text: `*Form:*\n${title}` },
          { type: "mrkdwn", text: `*Submitted:*\n${r.submitted_at || "unknown"}` },
          { type: "mrkdwn", text: `*Answers:*\n${(r.answers || []).length}` },
          { type: "mrkdwn", text: `*First answer:*\n${firstValue === null ? "none" : String(firstValue)}` }
        ]
      }
    ]
  };
}

Filter Examples

Filter conditions read dotted paths out of the payload. logic must be AND or OR.

One Form Only

{
  "name": "Feedback Survey Only",
  "logic": "AND",
  "conditions": [
    {
      "field": "form_response.form_id",
      "operator": "equals",
      "value": "frm_def456"
    }
  ]
}

Low Scores Only

Positional paths depend on the order of answers, which follows the form's field order. This reads the first answer, so it holds only while that field stays first.

{
  "name": "Detractors",
  "logic": "AND",
  "conditions": [
    {
      "field": "form_response.answers.0.number",
      "operator": "less_than",
      "value": 7
    }
  ]
}

Completed Responses Only

{
  "name": "Submitted",
  "logic": "AND",
  "conditions": [
    {
      "field": "form_response.submitted_at",
      "operator": "exists",
      "value": ""
    }
  ]
}

Headers

Header	Description
`Typeform-Signature`	`sha256=` followed by the base64 HMAC-SHA256 of the raw body

Hookbase does not forward these headers to your destination. A delivery is a fresh request: Hookbase sets Content-Type, User-Agent: Hookbase/1.0, X-Delivery-ID and X-Event-ID, then adds the headers and auth you configured on the destination. Nothing Typeform sent reaches your handler as a header — read what you need out of the body, or set it on the destination yourself.

Of the incoming headers, only content-type, user-agent, x-github-event, x-gitlab-event and stripe-signature are stored on the event, so those are the only ones visible later in the dashboard or the API.

Troubleshooting

Signature Verification Failed

Confirm you are comparing base64, not hex. See the warning above — this is the most common cause, and it looks exactly like a wrong secret
Confirm the source's provider is typeform. A source left on custom reads X-Signature, X-Webhook-Signature and X-Hub-Signature-256 and expects hex, so Typeform's header is never even read
Confirm the secret on the Typeform webhook and the signingSecret on the source are the same string. Because you choose this value, a typo in either place is possible and produces no other symptom
Confirm the form actually has a secret set. Without one, Typeform sends no signature header, and a source with a signingSecret records that as unverified

No Events Arriving

Check the webhook is toggled on for that form
Confirm the endpoint matches your ingest URL exactly, including the org and source slugs
Typeform sends on submission. A respondent who lands on the form without finishing it produces no webhook

Duplicate Events

Typeform puts an event_id on every delivery and a token on every response. Hookbase has no provider event-id extractor for Typeform, so the default auto dedup strategy falls back to hashing the payload — which is close to equivalent here, because both ids are part of the body. Use form_response.token in your handler as the idempotency key: it identifies the response, so a retry and a genuine resubmission are distinguishable.