Credential Sharing for AI Agents

TL;DR: AI agents need credentials to call APIs, access databases, and interact with services. The dominant approach — persistent vault access with scoped runtime fetch — is appropriate for production systems. But many agent workflows are better served by ephemeral credential handoff: deliver the credential via a self-destructing link that the agent reads once and that ceases to exist afterward. No vault integration, no standing access, no persistent secret in the delivery channel. Password Pusher does this via its REST API.

AI agents have a credential problem

Every useful AI agent eventually needs a credential. An API key for a third-party service, a database password for a migration script, an OAuth token for a customer’s system, a license key for a deployment. The agent cannot do its job without the secret, and someone — or something — has to deliver it.

This is not a theoretical concern. A 2026 survey of 919 executives and practitioners found that 88% had confirmed or suspected a security incident involving AI agents. A separate Pulse Research study (107 enterprises, July 2026) found that 69% have credential sharing somewhere in their agent fleet — and those organizations experienced incidents at a 63.5% rate, compared to 40.9% for organizations that give every agent its own scoped identity.

The Cloud Security Alliance published guidance in July 2026 recommending that organizations treat AI agent identities as a separate governance category, with dedicated lifecycle policies for the credentials they carry. Microsoft expanded its Zero Trust framework specifically to address AI agent credential management.

The patterns driving these incidents are familiar: credentials hardcoded in agent configurations, API keys in environment variables that never rotate, secrets pasted into prompts or stored in agent memory. The same patterns that made .env files the leading source of credential leaks in traditional software, now replicated in agent workflows.

Two models for giving agents credentials

The approaches emerging in the market split into two categories.

Persistent vault access. The agent authenticates to a secrets vault at runtime and fetches scoped, time-limited credentials on demand. Bitwarden’s Agent Access SDK, 1Password’s integrations for Claude and Codex, and C1’s Agentic Vault all follow this model. The agent maintains an ongoing relationship with the vault. This is the right approach for production systems that run continuously, access multiple services, and need automated credential rotation.

Ephemeral handoff. The credential is delivered to the agent via a one-time channel — a self-destructing link, a short-lived token, a temporary endpoint — that ceases to exist after the agent consumes it. There is no vault relationship. There is no standing access to revoke. The credential was delivered, consumed, and the delivery mechanism destroyed itself.

These are not competing models. They solve different problems.

When ephemeral handoff is the right choice

Persistent vault access makes sense when an agent runs continuously, accesses many services, and needs credentials that rotate automatically. It is infrastructure.

Ephemeral handoff makes sense when:

A human is giving a credential to an agent for a specific task. An IT admin passing a database password to a migration agent. A developer sharing an API key with a coding assistant for a single session. A security team provisioning a temporary access token for an audit workflow.
The credential should not persist in the delivery channel. Pasting an API key into a chat prompt means it lives in chat history indefinitely. Emailing a password means it sits in an inbox. A self-destructing link eliminates the credential from the channel after it has been read.
You need an audit trail for the handoff itself. When was the credential shared? Was it accessed? By whom? When did it expire? These questions matter for compliance, and they require the delivery mechanism to track its own lifecycle — not just the credential’s.
The agent workflow is ad-hoc, not continuous. Many agent interactions are one-off: a consultant running a diagnostic, a support engineer accessing a customer environment, a developer testing against a staging API. These do not justify vault integration.

How this works with Password Pusher

Password Pusher’s REST API supports this workflow directly. Create a push with the credential, configure it to expire after one view or a short time window, and hand the URL to the agent.

curl -X POST https://pwpush.com/api/v2/pushes.json \
  -H "Authorization: Bearer YOUR_API_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "push": {
      "payload": "sk-proj-abc123...your-api-key",
      "expire_after_views": 1,
      "expire_after_days": 1,
      "retrieval_step": true,
      "note": "API key for migration agent - task #4821"
    }
  }'

The response includes a URL. The agent (or the agent’s operator) retrieves the credential from that URL. After one view, the push is destroyed. The audit log records when it was created, when it was viewed, and from which IP address.

A few details that matter for agent workflows:

retrieval_step: true adds a confirmation step before revealing the payload. This prevents email security scanners and URL preview bots from consuming the single view before the agent can.
note is an encrypted private field. Use it to link the push back to the workflow or ticket that triggered it — useful for audit trails.
expire_after_views: 1 means exactly one retrieval. Combined with a short expire_after_days, the credential exists in the delivery channel for the minimum possible window.
The push payload is encrypted at rest with AES-256-GCM. The encryption layer is open source and auditable.

For automated workflows, the same API call can be made from a CI/CD pipeline, a runbook, or an orchestration layer. The pattern is the same: create, deliver, consume, destroy.

Where this might not be the right fit

Ephemeral handoff is not a vault replacement. If your agent needs to access the same credential repeatedly across sessions, rotate credentials automatically, or manage a portfolio of secrets for multiple services, you need a secrets manager. Password Pusher does not store credentials persistently and does not do runtime credential injection.

It is also not a zero-knowledge system. The server encrypts payloads at rest, but the payload is decrypted server-side for retrieval. If your threat model requires that the server operator never sees the plaintext, you need a client-side encryption tool.

What it does well is the handoff itself: get a credential from point A to point B, verify it was received, and ensure it does not linger in the channel afterward.

Availability

The REST API is available on all editions of Password Pusher: the free hosted service at pwpush.com, paid plans with additional features (file attachments, team policies, SSO), and the open source self-hosted edition.

Peter Giacomo Lombardo Founder & Principal, Apnotic · Creators of Password Pusher