diff --git a/source/SIL.AppBuilder.Portal/src/lib/components/ProductDetails.svelte b/source/SIL.AppBuilder.Portal/src/lib/components/ProductDetails.svelte
index 45d991dc8..a57c8cc0b 100644
--- a/source/SIL.AppBuilder.Portal/src/lib/components/ProductDetails.svelte
+++ b/source/SIL.AppBuilder.Portal/src/lib/components/ProductDetails.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
   import * as m from '$lib/paraglide/messages';
-  import { ProductTransitionType } from 'sil.appbuilder.portal.common/prisma';
   import { getTimeDateString } from '$lib/timeUtils';
+  import { ProductTransitionType } from 'sil.appbuilder.portal.common/prisma';
 
   export let product: {
     Id: string;
@@ -85,7 +85,6 @@
               {#if ![2, 3, 4].includes(transition.TransitionType)}
                 {transition.AllowedUserNames || m.appName()}
               {/if}
-              <!-- TODO: handle username for Project Access transition types -->
             </td>
             <td>{transition.Command ?? ''}</td>
             <td>
diff --git a/source/SIL.AppBuilder.Portal/src/routes/(authenticated)/projects/[id=idNumber]/+page.svelte b/source/SIL.AppBuilder.Portal/src/routes/(authenticated)/projects/[id=idNumber]/+page.svelte
index fba1ec4d5..0ca284cd5 100644
--- a/source/SIL.AppBuilder.Portal/src/routes/(authenticated)/projects/[id=idNumber]/+page.svelte
+++ b/source/SIL.AppBuilder.Portal/src/routes/(authenticated)/projects/[id=idNumber]/+page.svelte
@@ -2,15 +2,15 @@
   import { enhance } from '$app/forms';
   import { page } from '$app/stores';
   import IconContainer from '$lib/components/IconContainer.svelte';
+  import ProductDetails from '$lib/components/ProductDetails.svelte';
   import { i18n } from '$lib/i18n';
   import { getIcon } from '$lib/icons/productDefinitionIcon';
   import langtags from '$lib/langtags.json';
   import * as m from '$lib/paraglide/messages';
-  import { getRelativeTime, getTimeDateString } from '$lib/timeUtils';
-  import { ProductTransitionType, RoleId } from 'sil.appbuilder.portal.common/prisma';
+  import { getRelativeTime } from '$lib/timeUtils';
+  import { RoleId } from 'sil.appbuilder.portal.common/prisma';
   import { superForm } from 'sveltekit-superforms';
   import type { PageData } from './$types';
-  import ProductDetails from '$lib/components/ProductDetails.svelte';
 
   const langtagmap = new Map(langtags.map((tag) => [tag.tag, /* tag.localname ?? */ tag.name]));
 
diff --git a/source/SIL.AppBuilder.Portal/src/routes/(unauthenticated)/api/projects/[id=idNumber]/token/+server.ts b/source/SIL.AppBuilder.Portal/src/routes/(unauthenticated)/api/projects/[id=idNumber]/token/+server.ts
new file mode 100644
index 000000000..39b239c5d
--- /dev/null
+++ b/source/SIL.AppBuilder.Portal/src/routes/(unauthenticated)/api/projects/[id=idNumber]/token/+server.ts
@@ -0,0 +1,251 @@
+import { jwtVerify } from 'jose';
+import { createPublicKey } from 'node:crypto';
+import { prisma, BuildEngine, DatabaseWrites } from 'sil.appbuilder.portal.common';
+import { RoleId, ProductTransitionType } from 'sil.appbuilder.portal.common/prisma';
+import { error, json } from '@sveltejs/kit';
+
+const TOKEN_USE_HEADER = 'Use';
+const TOKEN_USE_UPLOAD = 'Upload';
+const TOKEN_USE_DOWNLOAD = 'Download';
+
+export async function POST({ params, request, fetch }) {
+  if (!request.headers.get('Authorization')) {
+    return error(401, `Unauthorized`);
+  }
+
+  const authToken = request.headers.get('Authorization')?.replace('Bearer ', '');
+
+  let jwtData;
+  try {
+    jwtData = await decryptJwtWithAuth0(authToken ?? '');
+  } catch (e) {
+    // Signature verification failed
+    return error(401, `Unauthorized`);
+  }
+  const user = await prisma.users.findMany({
+    where: {
+      ExternalId: jwtData.payload.sub
+    },
+    select: {
+      Id: true,
+      Name: true,
+      Email: true,
+      WorkflowUserId: true,
+      UserRoles: {
+        select: {
+          OrganizationId: true,
+          RoleId: true
+        }
+      }
+    }
+  });
+  if (user.length !== 1) {
+    // Should never happen
+    // (unless the user doesn't exist?)
+    return error(500, `Internal Server Error`);
+  }
+
+  // user[0] is now authenticated. Still need to check authorization
+  const projectId = parseInt(params.id);
+
+  const tokenUse = request.headers.get(TOKEN_USE_HEADER);
+
+  const project = await prisma.projects.findUnique({
+    where: {
+      Id: projectId
+    },
+    select: {
+      WorkflowProjectUrl: true,
+      WorkflowProjectId: true,
+      Owner: {
+        select: {
+          Id: true,
+          ExternalId: true
+        }
+      },
+      OrganizationId: true
+    }
+  });
+  if (!project) {
+    return new Response(
+      JSON.stringify({
+        errors: [{ title: `Project id=${projectId} not found` }]
+      }),
+      {
+        status: 404
+      }
+    );
+  }
+
+  if (!project.WorkflowProjectUrl) {
+    return new Response(
+      JSON.stringify({
+        errors: [{ title: `Project id=${projectId}: WorkflowProjectUrl is null` }]
+      }),
+      {
+        status: 404
+      }
+    );
+  }
+
+  // Check ownership
+  let readOnly: boolean | null = null;
+  if (user[0].Id === project.Owner.Id) {
+    readOnly = false;
+  }
+
+  // Check roles
+  if (readOnly === null) {
+    user[0].UserRoles.every(({ OrganizationId: org, RoleId: role }) => {
+      if (
+        role === RoleId.SuperAdmin ||
+        (org === project.OrganizationId && role === RoleId.OrgAdmin)
+      ) {
+        readOnly = true;
+        return false; // This works like a `break;`
+      }
+    });
+  }
+
+  // Check authors
+  if (readOnly === null) {
+    const authors = await prisma.authors.findMany({
+      where: {
+        ProjectId: projectId
+      },
+      select: {
+        UserId: true
+      }
+    });
+    if (authors.find((a) => a.UserId === user[0].Id)) {
+      // TODO: Kalaam now wants authors to be able to update at any time.  In the future, we can add a setting on the author to whether they are a restricted author or not. I don't have time to add the UI at the moment.
+      //readOnly = !author.CanUpdate;
+      readOnly = false;
+    }
+  }
+
+  if (readOnly === null) {
+    return new Response(
+      JSON.stringify({
+        errors: [
+          {
+            title: `Project id=${projectId}, user='${user[0].Name}' with email='${user[0].Email}' does not have permission to access`
+          }
+        ]
+      }),
+      {
+        status: 403
+      }
+    );
+  }
+
+  if (tokenUse && tokenUse === TOKEN_USE_UPLOAD && readOnly) {
+    return new Response(
+      JSON.stringify({
+        errors: [
+          {
+            title: `Project id=${projectId}, user='${user[0].Name}' with email='${user[0].Email}' does not have permission to Upload`
+          }
+        ]
+      }),
+      {
+        status: 403
+      }
+    );
+  }
+
+  const tokenResult = await BuildEngine.Requests.getProjectAccessToken(
+    { type: 'query', organizationId: project.OrganizationId },
+    project.WorkflowProjectId,
+    {
+      name: project.Owner.ExternalId ?? '',
+      ReadOnly: readOnly
+    }
+  );
+
+  if (!tokenResult || tokenResult.responseType === 'error') {
+    return new Response(
+      JSON.stringify({
+        errors: [{ title: `Project id=${projectId}: GetProjectToken returned null` }]
+      }),
+      {
+        status: 400
+      }
+    );
+  }
+  if (tokenResult.SecretAccessKey == null) {
+    return new Response(
+      JSON.stringify({
+        errors: [{ title: `Project id=${projectId}: Token.SecretAccessKey is null` }]
+      }),
+      {
+        status: 400
+      }
+    );
+  }
+  const projectToken = {
+    type: 'project-tokens',
+    attributes: {
+      id: projectId,
+      url: project.WorkflowProjectUrl,
+      'session-token': tokenResult.SessionToken,
+      'secret-access-key': tokenResult.SecretAccessKey,
+      'access-key-id': tokenResult.AccessKeyId,
+      expiration: tokenResult.Expiration,
+      region: tokenResult.Region,
+      'read-only': tokenResult.ReadOnly
+    }
+  };
+
+  let use = readOnly ? 'ReadOnly Access' : 'ReadWrite Access';
+
+  if (tokenUse) {
+    use = tokenUse;
+  }
+  const products = await prisma.products.findMany({
+    where: { ProjectId: projectId },
+    select: { Id: true }
+  });
+
+  await DatabaseWrites.productTransitions.createMany({
+    data: products.map((p) => ({
+      ProductId: p.Id,
+      AllowedUserNames: user[0].Name,
+      TransitionType: ProductTransitionType.ProjectAccess,
+      InitialState: 'Project ' + use,
+      WorkflowUserId: user[0].WorkflowUserId,
+      DateTransition: new Date()
+    }))
+  });
+
+  return json({ data: projectToken });
+}
+const secrets = (async () => {
+  const res = await fetch(
+    'https://' + import.meta.env.VITE_AUTH0_DOMAIN + '/.well-known/jwks.json'
+  );
+  const keys: {
+    kty: string;
+    use: string;
+    n: string;
+    e: string;
+    kid: string;
+    x5t: string;
+    x5c: string[];
+    alg: string;
+  }[] = (await res.json()).keys;
+  return new Map(
+    keys.map((key) => [
+      key.kid,
+      createPublicKey({
+        key,
+        format: 'jwk'
+      })
+    ])
+  );
+})();
+async function decryptJwtWithAuth0(jwt: string) {
+  return jwtVerify(jwt, async (header, token) => {
+    return (await secrets).get(header.kid!)!;
+  });
+}