Akeyless (SecretlessAI and MCP server) vs HashiCorp Vault + Vault MCP Server

Akeyless (SecretlessAI and MCP server)

Gateway-brokered SecretlessAI and a runtime-authority MCP server with 4 tools that return results, not credentials. No published prices above the free plan; clients and transactions are metered with overage billed at the end of a 12-month contract.

HashiCorp Vault + Vault MCP Server

Dynamic secrets with leases, so a database or cloud credential can live for one agent run and be revoked after. The MCP server's newest build is 0.2.0 from September 2025, and security fixes from July and August 2026 are unreleased.

Akeyless (SecretlessAI and MCP server)

1. Run akeyless mcp-runtime-authority, not akeyless mcp, for an agent that acts on systems; the first returns results, the second has get_secret and get_password
2. Authenticate with a cloud identity, Kubernetes or Universal Identity rather than an access key, which the docs reserve for proofs of concept
3. Use CLI 1.130.0 or later for either MCP server, and point the client at your Gateway URL
4. Count identities and calls before scaling. The free plan allows 5 clients, and calls over a tier's cap (200 a minute on Silver) are billed as extra clients, not refused
5. Pass the token in the JSON body of each POST, and page /list-items with pagination-token

HashiCorp Vault + Vault MCP Server

1. Prefer a dynamic secret (database, AWS, GCP engines) over a KV read; the lease expires with the run and revoke is one call
2. Log in with AppRole or Kubernetes auth and keep the token for its TTL. Renew with auth/token/renew-self rather than logging in per request
3. For KV v2, GET /v1/<mount>/data/<path> and read data.data, and pass cas on writes so a retry can't overwrite a newer version
4. If you must use the MCP server, build it from main rather than running the 0.2.0 image, run it over stdio, and give it a token limited to one mount
5. Ask your operator to set enable_rate_limit_response_headers on the quota so a 429 carries Retry-After