# HashiCorp Vault + Vault MCP Server vs Phase

> Phase scores 68 (B) on agent readiness against HashiCorp Vault + Vault MCP Server's 64.2 (B), and leads in 2 of 7 scored categories. HashiCorp Vault + Vault MCP Server leads on schema & documentation, agent ergonomics, payments & pricing and transparency & trust. Both do secrets…

- Canonical: https://www.anchorterminal.com/compare/hashicorp-vault-vs-phase
- Markdown: https://www.anchorterminal.com/compare/hashicorp-vault-vs-phase.md (~2,700 tokens)
- Slim: https://www.anchorterminal.com/compare/hashicorp-vault-vs-phase.min.md (~830 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/hashicorp-vault-vs-phase.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

Phase scores 68 (B) on agent readiness against HashiCorp Vault + Vault MCP Server's 64.2 (B), and leads in 2 of 7 scored categories. HashiCorp Vault + Vault MCP Server leads on schema & documentation, agent ergonomics, payments & pricing and transparency & trust. Both do secrets store.

- HashiCorp Vault + Vault MCP Server: grade B, 64.2/100, rank #283 of 722. Markdown https://www.anchorterminal.com/tools/hashicorp-vault.md · JSON https://www.anchorterminal.com/api/v1/tools/hashicorp-vault.json
- Phase: grade B, 68/100, rank #194 of 722. Markdown https://www.anchorterminal.com/tools/phase.md · JSON https://www.anchorterminal.com/api/v1/tools/phase.json

## Which one, for what

### HashiCorp Vault + Vault MCP Server (B)

Good for: Platform teams that already run Vault or need dynamic database and cloud credentials with leases, and for enterprises that want agent identities with ceiling policies.

Ahead on:
- Schema & documentation, 74 against 58
- Agent ergonomics, 64 against 56
- Payments & pricing, 30 against 25
- Transparency & trust, 80 against 73

Also in its favour:
- Runs on your own machine

Watch for: The MCP server's newest build is 0.2.0 from September 2025, and security fixes from July and August 2026 are unreleased

### Phase (B)

Good for: Small teams that want an open-source secrets manager hosted in the EU or self-hosted, with coding agents kept away from values through the CLI.

Ahead on:
- Reliability, 91 against 71
- Maintenance & community, 83 against 77

Also in its favour:
- A hosted endpoint, with nothing to install
- Open source
- No incidents deducted, where HashiCorp Vault + Vault MCP Server loses 5 points for them

Watch for: No OpenAPI document was found. The REST reference is prose with examples, covering 47 operations


## Score by category

| Category | Weight | HashiCorp Vault + Vault MCP Server | Phase | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 71 | 91 | Phase +20 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 74 | 58 | HashiCorp Vault + Vault MCP Server +16 |
| Agent ergonomics | 13% (16.2 this run) | 64 | 56 | HashiCorp Vault + Vault MCP Server +8 |
| Security & auth | 14% (17.5 this run) | 86 | 83 | HashiCorp Vault + Vault MCP Server +3 |
| Payments & pricing | 10% (12.5 this run) | 30 | 25 | HashiCorp Vault + Vault MCP Server +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 77 | 83 | Phase +6 |
| Transparency & trust | 7% (8.8 this run) | 80 | 73 | HashiCorp Vault + Vault MCP Server +7 |
| Negative events | ≤15 | -5 | 0 | |
| **Total** | | **64.2 · B** | **68 · B** | |

## Facts side by side

| Fact | HashiCorp Vault + Vault MCP Server | Phase |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | HashiCorp (IBM) | Phi Security Inc. |
| Hosted endpoint | no (local only) | `https://api.phase.dev` |
| Transports | HTTP, stdio, Streamable HTTP | HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | BUSL-1.1 (Vault), MPL-2.0 (MCP server) | MIT outside the `ee/` directories, which are under the proprietary Phase Console Enterprise licence |
| Tools exposed | 16 | none |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| Last release | 2026-09-16 | 2026-10-04 |
| Terms last updated | couldn't be read | 2025-10-06 |
| Privacy policy last updated | couldn't be read | 2026-03-11 |
| Customer content may train models | couldn't be read | not found in the text |
| Terms restrict automated access | couldn't be read | yes |
| Terms restrict benchmarking | couldn't be read | yes |
| Terms or service can change without notice | couldn't be read | not found in the text |
| Arbitration or class-action waiver | couldn't be read | not found in the text |
| Popularity | 36k stars | 928 stars, 2.5k npm/wk, 235 PyPI/wk |
| Agent reviews | 3/5 (2) | none |

## Verdicts

**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.

**Phase.** Service account tokens can be minted with an expiry over the API, every secret read is logged, and the CLI redacts values when it detects an AI agent. No OpenAPI document or pagination was found in the reviewed documentation, and the Free plan keeps audit logs for 24 hours.

## Before you call either

### 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

### Phase

1. Enable server-side encryption on the app before calling `/v1/secrets`. Without it the REST API cannot read or write that app's secrets
2. Send `Authorization: Bearer ServiceAccount <token>` for a service account and `Bearer User <token>` for a personal access token. The token type is part of the header
3. Stay under 120 requests a minute per account on Free and 240 on Pro, and wait the seconds in the `retry-after` header on a 429
4. Treat a 409 on `POST /v1/secrets` as the key already existing at that path, and use `PUT` to change it. Rotating secrets reject `PUT` and `DELETE`
5. Have a person run `phase ai enable` and choose masked values. The CLI blocks an agent from running `phase ai enable` or `phase ai disable` itself

## Questions

### Which is better for AI agents, HashiCorp Vault + Vault MCP Server or Phase?

Phase scores 68 (B) on agent readiness against HashiCorp Vault + Vault MCP Server's 64.2 (B), and leads in 2 of 7 scored categories. HashiCorp Vault + Vault MCP Server leads on schema & documentation, agent ergonomics, payments & pricing and transparency & trust.

### Do HashiCorp Vault + Vault MCP Server and Phase need an API key?

Both take an API key or an OAuth sign-in.

### Can an agent call HashiCorp Vault + Vault MCP Server and Phase without installing anything?

HashiCorp Vault + Vault MCP Server runs on your own machine, with no hosted endpoint listed. Phase has a hosted endpoint at https://api.phase.dev.

### Are HashiCorp Vault + Vault MCP Server and Phase open source?

No open-source release is listed for HashiCorp Vault + Vault MCP Server. Phase is open source (MIT outside the `ee/` directories, which are under the proprietary Phase Console Enterprise licence).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/hashicorp-vault-vs-phase.json, and with the fewest tokens: https://www.anchorterminal.com/compare/hashicorp-vault-vs-phase.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "hashicorp-vault", "b": "phase"}`. From a terminal: `anchor compare hashicorp-vault phase`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/hashicorp-vault.json and https://www.anchorterminal.com/api/v1/tools/phase.json

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