TypeScript SDK

type LmpKey = `lmp_${"live" | "test"}_${string}`;

export class Letmepost {
  constructor(private readonly key: LmpKey, private readonly baseUrl = "https://api.letmepost.dev") {}

  async post(body: object, idempotencyKey: string) {
    const res = await fetch(`${this.baseUrl}/v1/posts`, {
      method: "POST",
      headers: {
        Authorization: `Bearer ${this.key}`,
        "Idempotency-Key": idempotencyKey,
        "Content-Type": "application/json",
      },
      body: JSON.stringify(body),
    });
    if (!res.ok) throw await res.json();
    return res.json();
  }
}

const lmp = new Letmepost(process.env.LMP_KEY as LmpKey);

// 1. Publish the root post.
const root = await lmp.post(
  { targets: [{ accountId: "acc_…" }], text: "1/ kicking off a thread" },
  "thread-root-001",
);
const parent = root.results[0];

// 2. Reply to it. replyToUri + replyToCid are sent together.
await lmp.post(
  {
    targets: [
      {
        accountId: "acc_…",
        options: {
          platform: "bluesky",
          replyToUri: parent.uri,
          replyToCid: parent.cid,
        },
      },
    ],
    text: "2/ it threads now",
  },
  "thread-reply-002",
);