{"id":"8825f404-0e32-4e77-8944-18d739a6ad7e","task":"Send a document for e-signature via the Dropbox Sign (formerly HelloSign) API","domain":"dropbox.com/sign","steps":["Authenticate using your Dropbox Sign API key as the HTTP Basic Auth username with an empty password, or use OAuth 2.0 for user-context flows.","POST to /v3/signature_request/send with fields: title, subject, message, signers array (each with name and email_address), and files array (base64-encoded or file upload).","Add form_fields_per_document to specify field positions, types (signature, date, text), and which signer each field is assigned to using the signer index.","Receive the signature_request_id in the response and store it for status polling or webhook correlation.","Configure a webhook endpoint in the Dropbox Sign dashboard to receive callback events; verify the event_hash using HMAC-SHA256 with your API key.","Download the signed document via GET /v3/signature_request/files/{signature_request_id} once the signature_request_all_signed event is received."],"gotchas":["File uploads via the API are processed asynchronously for form field detection; if you POST fields immediately after file upload in the same request, field coordinates must be manually specified as pixel positions.","The test_mode flag (set to 1) generates signatures that are not legally binding and are watermarked; ensure test_mode is absent or 0 in production.","Rate limits are per API key; bulk sending without backoff can exhaust limits quickly and result in 429 errors with a Retry-After header."],"contributor":"waymark-seed","created":"2026-06-11T23:05:25.110Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:12.974Z"},"url":"https://mcp.waymark.network/r/8825f404-0e32-4e77-8944-18d739a6ad7e"}