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sync-api SKILL.md skillA

sync-api from synchronicity-labs/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add synchronicity-labs/skills/sync-api@git:20261105.7d7e7d4

Pins git:20261105.7d7e7d4 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: synchronicity-labs/skills
Path: skills/sync-api/SKILL.md
Versions recorded: 1
Latest version: git:20261105.7d7e7d4, committed Nov 5, 2026
Size: 5,779 bytes
Repository stars: 6
License: MIT

Build sync. labs (sync.so) lipsync, dubbing and talking-image generation into an app, backend, script or pipeline with the sync. REST API or the official Python (syncsdk) and TypeScript (@sync.so/sdk) SDKs. Covers API keys, uploads, creating generations with idempotency keys, webhooks with signature checks, polling, models, cost estimates, error handling, concurrency limits and the Batch API. Use whenever code calls or should call the sync. API, for example "add lipsync to my Next.js app…

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Build with the sync. API

Builds a server-side integration that uploads media, saves each request before submitting it, tracks jobs to completion, and retries without starting duplicate paid work.

## Ground rules

- **Server-side only.** The API key goes in `SYNC_API_KEY` on the server, never in browser or mobile code. Browsers talk to your backend, and your backend talks to sync. Keys come from https://sync.so/settings/api-keys.
- **Base URL** `https://api.sync.so/v2`, header `x-api-key`.
- **SDKs:** Python `pip install syncsdk` (`from sync import Sync`), TypeScript `npm i @sync.so/sdk` (`new SyncClient()`). Both read `SYNC_API_KEY`. The SDKs cover generations (`create`, `get`, `list`) and batches. Some newer request fields can lag behind the API: image inputs, `dubParams`, `dialogueEdit`, `projectId`, uploads and cost estimates. When the installed SDK's types don't include one, call the endpoint over HTTP as the references show, instead of forcing the types.
- **Docs for anything not covered here:** https://sync.so/docs/llms-full.txt, plus the error catalog at `GET https://api.sync.so/v2/errors`, which needs no key.

## The flow to implement
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add synchronicity-labs/skills/sync-api@sha256:1319bf8b74e31f7a

The line at the top of this page pins the label git:20261105.7d7e7d4, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_lvhvkq6d5vjooikl.svg)](https://markdownregistry.com/a/art_lvhvkq6d5vjooikl)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Nov 5, 2026.

version	committed	commit	size	audit
git:20261105.7d7e7d4 latest	2026-11-05	7d7e7d4	5,779 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (5779 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

synchronicity-labs/skills · 6 stars · license MIT · pushed 2026-11-05 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_lvhvkq6d5vjooikl
GET https://markdownregistry.com/api/v1/resolve?ref=synchronicity-labs/skills/sync-api
GET https://markdownregistry.com/api/v1/blob/1319bf8b74e31f7a8ea90907b0b1921cfb653a4014a2b36bc157d196d56dc7d3

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.