> ## Documentation Index
> Fetch the complete documentation index at: https://docs.topsort.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Segments API

> Integrate with our Segments API

export const IntegrationsCard1A = () => {
  return <>
      <style>{`
        .integrations-card-1a {
          display: flex;
          flex-direction: column;
          background-color: #f0f2f4;
          border: 1px solid rgba(0, 0, 0, 0.08);
          border-radius: 12px;
          padding: 1.25rem 1.5rem;
          gap: 0.25rem;
          color: #25253b;
          box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
          transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
          margin-top: 2rem;
        }

        .integrations-card-1a:hover {
          box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
          border-color: rgba(0, 0, 0, 0.12);
        }

        .dark .integrations-card-1a {
          background-color: #25253b;
          color: #f6f8fa;
          border-color: rgba(255, 255, 255, 0.08);
          box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        }

        .dark .integrations-card-1a:hover {
          box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
          border-color: rgba(255, 255, 255, 0.12);
        }

        .integrations-card-1a-avatar-row {
          display: flex;
          margin-left: 14px;
          flex-wrap: nowrap;
        }

        .integrations-card-1a-avatar {
          width: 44px;
          height: 44px;
          border-radius: 50%;
          border: 2px solid #f0f2f4;
          margin-left: -14px;
          object-fit: cover;
          box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
          pointer-events: none;
          cursor: default;
        }

        .dark .integrations-card-1a-avatar {
          border-color: #25253b;
          box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }

        .integrations-card-1a h2 {
          margin: 0;
          line-height: 1.25;
          font-size: clamp(1.25rem, calc(0.875rem + 1.25vw), 1.75rem);
          font-weight: 700;
          letter-spacing: -0.025em;
          color: #111827;
        }

        .dark .integrations-card-1a h2 {
          color: #f9fafb;
        }

        .integrations-card-1a-subtitle {
          font-size: 0.9375rem;
          font-weight: 500;
          line-height: 1.5;
          color: #4b5563;
          margin: 0;
        }

        .dark .integrations-card-1a-subtitle {
          color: #d1d5db;
        }

        .integrations-card-1a p {
          margin: 0;
          line-height: 1.5;
          font-size: 0.875rem;
          color: #374151;
        }

        .dark .integrations-card-1a p {
          color: #d1d5db;
        }

        .integrations-card-1a a {
          color: #0500ff;
          text-decoration: none;
          font-weight: 500;
          transition: color 0.15s ease;
        }

        .integrations-card-1a a:hover {
          color: #0400cc;
        }

        .dark .integrations-card-1a a {
          color: #8280ff;
        }

        .dark .integrations-card-1a a:hover {
          color: #a19fff;
        }

        @media (max-width: 640px) {
          .integrations-card-1a-avatar {
            width: 38px;
            height: 38px;
            margin-left: -12px;
          }

          .integrations-card-1a-avatar-row {
            margin-left: 12px;
          }
        }

        @media (min-width: 1280px) {
          .integrations-card-1a p {
            font-size: 0.6875rem;
            line-height: 1.4;
            letter-spacing: -0.01em;
          }

          .integrations-card-1a h2 {
            font-size: clamp(1rem, calc(0.75rem + 1vw), 1.25rem);
          }

          .integrations-card-1a-subtitle {
            font-size: 0.75rem;
          }
        }
      `}</style>
      <div className="integrations-card-1a">
        <div className="integrations-card-1a-avatar-row">
          <img src="/images/integration-team/agustin.webp" alt="Agustin - Integrations Team Member" loading="lazy" className="integrations-card-1a-avatar" />
          <img src="/images/integration-team/amelia.webp" alt="Amelia - Integrations Team Member" loading="lazy" className="integrations-card-1a-avatar" />
          <img src="/images/integration-team/bernardita.webp" alt="Bernardita - Integrations Team Member" loading="lazy" className="integrations-card-1a-avatar" />
          <img src="/images/integration-team/borumy.webp" alt="Borumy - Integrations Team Member" loading="lazy" className="integrations-card-1a-avatar" />
          <img src="/images/integration-team/felipe.webp" alt="Felipe - Integrations Team Member" loading="lazy" className="integrations-card-1a-avatar" />
          <img src="/images/integration-team/gui.webp" alt="Gui - Integrations Team Member" loading="lazy" className="integrations-card-1a-avatar" />
          <img src="/images/integration-team/javiera.webp" alt="Javiera - Integrations Team Member" loading="lazy" className="integrations-card-1a-avatar" />
          <img src="/images/integration-team/linn.webp" alt="Linn - Integrations Team Member" loading="lazy" className="integrations-card-1a-avatar" />
          <img src="/images/integration-team/marcio.webp" alt="Marcio - Integrations Team Member" loading="lazy" className="integrations-card-1a-avatar" />
          <img src="/images/integration-team/mateus.webp" alt="Mateus - Integrations Team Member" loading="lazy" className="integrations-card-1a-avatar" />
          <img src="/images/integration-team/max.webp" alt="Max - Integrations Team Member" loading="lazy" className="integrations-card-1a-avatar" />
          <img src="/images/integration-team/rodrigo.webp" alt="Rodrigo - Integrations Team Member" loading="lazy" className="integrations-card-1a-avatar" />
        </div>

        <h2>Need help with your Topsort integration?</h2>

        <p className="integrations-card-1a-subtitle">
          Talk to us, the integrations engineering team.
        </p>

        <p>
          Reach us via <strong>your dedicated messaging channel</strong> or at{" "}
          <a href="mailto:support@topsort.com">support@topsort.com</a>.
        </p>

        <p>
          If you're not a customer yet,{" "}
          <a href="https://www.topsort.com/book-a-demo">book a demo</a> with our
          sales team instead.
        </p>
      </div>
    </>;
};

Topsort's [Segments API](/en/api-reference/segments-service) allows our clients to create and manage groups of users for targeting purposes. After creating segments on our platform, they can be used as targeting in the campaign creation.

## Uploading Users to a Segment

Once a segment is created, users can be uploaded to it using our APIs. Topsort support three actions:

* **Add**: Append new users to the existing segment, without making changes to existing ones.
* **Remove**: Delete specific users from the segment.
* **Replace**: Overwrite the entire segment with a new user list

User lists must follow this specification:

* File format is .txt
* No headers
* One Opaque User ID per row, without emails or personal information.

## Use in Campaigns

Segments are used as targeting options in campaigns. The same Opaque User ID uploaded to the segments should be used on the auction request, to guarantee the auction engine can match it with the corresponding segment.

<IntegrationsCard1A />