Post Oak Labs MCP server

• Registry nameco.ainumbers/toolsverified in the MCP registry

The registry name sits under ainumbers.co. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

• Stateanswerschecked 2026-10-19
• Tools74
• Server calls itselfainumbers-apps
• Server version1.2.0
• Protocol version2025-06-18

On 2026-10-19 the server answered initialize and tools/list without a sign-in. First answer in 634 ms.

• Answeredmeasuring2 of the 7 daily checks it takes to print a share
• Median first answer657 ms
• Space in an agent's context≈ 29,749 tokensthe definitions of all its tools (74), which an agent carries on every turn
• Tool definitionsA · 100 of 100

• Every tool passes all six checks.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The state of vendors' MCP servers: method and numbers →

• list_ainumbers_tools

  Search the AINumbers catalog (1200+ client-side fintech tools). Returns deep-links; prefill-enabled tools accept #in=<base64url(JSON of {element_id: value})>[&run=1] for one-click invocation.

• build_workflow_links

  Constructs an ordered set of ready-to-use deep-links for a named AINumbers workflow chain or an ad-hoc sequence of tools. Each link points directly to the browser tool; prefill-enabled steps accept #in=<base64url(JSON)> fragments so the…

• verify_execution_hash

  Independently verify a ChainGraph artifact (ChainGraph Standard v0.1 §6). Recomputes SHA-256 over the canonical (sorted-key, whitespace-stripped) JSON of policy_parameters + output_payload and compares it to the claimed execution_hash. A…

• build_chaingraph

  Hash-aware sibling of build_workflow_links (ChainGraph Standard v0.1 §8.1). Returns an ordered, executable DAG over the ChainGraph suite's verifiable tools, with explicit parent_hash wiring: which upstream execution_hash each step must…

• emit_chaingraph_artifact

  Makes ChainGraph tools agent-callable (ChainGraph Standard v0.1 §3.1). Mode 1 — supply pre_computed_artifact (exported from the browser tool): validates §4 schema fields, recomputes execution_hash via SHA-256 over canonical…

• build_session_receipt

  Aggregates execution_hashes from N ChainGraph tool calls in one agent session into a single SHA-256 Merkle root (session_receipt_root). Returns a tamper-evident session receipt and a regulator-framed PTG-01 audit prompt. One receipt…

• find_tool

  BM25 search over all 684 live AINumbers ChainGraph node tools. Returns ranked tools with mcp_name, URL, mandate type, and wave. Use to locate a specific computation node (e.g. "FRTB expected shortfall", "MiCA own funds", "XVA calculator"…

• find_chain

  BM25 search over all 388 AINumbers ChainGraph chains. Returns ranked chains with their full recipe: ordered node sequence, deep-links, composer URL, and entry tool mcp_name. Agent flow: find_chain(query) → read recipe → call the listed…

• run_chain

  Executes every step of a named chain (list names with find_chain / build_workflow_links) and returns ONE composite artifact whose execution_hash anchors all step outputs. compute:"server"/"auto" (default) runs each kernel-backed step…

• suite_howto

  How to chain AINumbers tools into audited workflows: call with NO recipe_id for the compact recipe index, or with one recipe_id for that workflow's full step-by-step recipe. Every recipe carries the suite conventions end to end: Policy…

• describe_tool

  Returns the full definition of exactly one AINumbers MCP tool: name, description, inputSchema, outputSchema (the JSON Schema its structuredContent validates against), annotations, and lifecycle_status. Use it after find_tool or find_chain…

• run_chain_batch

  Batch over named chains in ONE round-trip with a PER-ROW terminal status — one row's failure never fails another, and every row's result rides the single response. mode:"run" (default) executes each row through the same engine as…

• call_tool

  Runs ONE read-only AINumbers tool that is not in your tool list. tools/list is paginated (13 pages, 722 tools) and many hosts read only the first page; this is the door to the rest. Pass { name: "<exact mcp_name>", arguments: { ... } }…

• baas_provider_comparator

  Score and compare BaaS providers across 10 capability dimensions (regulatory standing, programme management, card issuance, rails, KYC/KYB, disputes, developer experience, pricing, FDIC pass-through, compliance tooling) with a…

• validate_ap2_mcp_policy

  Validate AP2 Policy Mandate JSON payloads against the Unified Build Contract v1.0 schema. Auto-generates MCP tool definitions from the mandate and simulates agent ingestion of agent_instructions. Use when authoring or testing AP2 agentic…

• build_google_ap2_mandate

  Build or validate a Google AP2 Checkout/Payment Mandate VDC (Open/Closed). Targets the external AP2 spec, not the AINumbers Policy Mandate. Renders the interactive AINumbers tool as a widget; inputs are applied via the AIN Bridge and the…

• score_mcp_readiness

  Compute a composite MCP server ship-readiness score across tool definitions, server.json, OAuth, transport, tool poisoning, and spec compliance. Renders the interactive AINumbers tool as a widget; inputs are applied via the AIN Bridge and…

• agentic_mandate_sandbox

  Simulate agent payment policies for tokenized A2A corridors: set spend caps, MCC allowlists, velocity throttles, and approval thresholds; run synthetic transactions against the policy and export the result as a Policy Mandate…

• customer_risk_rating

  Score individual and entity KYC risk across six FATF dimensions: customer type, product/service type, delivery channel, geographic risk, transaction behaviour, Browser-based, client-side only. Zero PII. Link users to…

• ap2_aml_mandate_builder

  Anchor agentic tool for Cat-12. Translate AML/BSA program controls, TM rules, and customer risk policy into a structured Policy Mandate JSON for agentic payment sy Browser-based, client-side only. Zero PII. Link users to…

• lint_mcp_tool_definition

  Validate an MCP tool definition against JSON Schema 2020-12 and current naming, output-schema, and annotation rules; returns findings, a conformance score, and a recommended annotation set. Use when a developer wants to check an MCP tool…

• validate_mcp_server_json

  Validate an MCP server.json against the 2025-12-11 schema and the official registry publishing rules; returns findings, a registry-readiness score, and an optional compliant skeleton. Use when a developer wants to check a server.json…

• compare_agentic_payment_protocols

  Compare agentic payment protocols (AP2, ACP/Shared Payment Token, x402, Visa TAP, Mastercard Agent Pay) across credential, signing, scope, rail, identity, and audit dimensions; optionally recommend a fit for a scenario. Read-only local…

• decode_x402_payment

  Decode an x402 payment header or lint an exact-scheme PaymentPayload, and describe the HTTP-402 verify/settle flow. Use when a developer is integrating x402 and needs to inspect a header, check a payload shape, or understand the flow…

• audit_mcp_oauth

  Audit MCP OAuth 2.1 authorization: validate RFC 9728 protected-resource-metadata, check RFC 8707 audience binding, and assess token-passthrough / confused-deputy risk. Use when a developer is securing an MCP server's authorization…

• scan_tool_poisoning

  Scan an MCP tool description/manifest for tool-poisoning and prompt-injection smells; returns a risk score and flagged patterns. Renders the interactive AINumbers tool as a widget; inputs are applied via the AIN Bridge and the tool runs…

• validate_a2a_agent_card

  Validate an A2A agent-card.json against the v1.0 shape, check signatures, and confirm extension declarations. Renders the interactive AINumbers tool as a widget; inputs are applied via the AIN Bridge and the tool runs client-side (zero…

• inspect_visa_tap_signature

  Inspect a Visa Trusted Agent Protocol HTTP Message Signature and score TAP readiness. Renders the interactive AINumbers tool as a widget; inputs are applied via the AIN Bridge and the tool runs client-side (zero PII, zero network). Output…

• run_kernel_vm

  Run a ChainGraph decision kernel's compute(policy_parameters) inside a sandboxed, deterministic, in-browser QuickJS-ng WebAssembly VM (ocg-deterministic-compute@2) and return its output_payload. Demo kernel set only -- for the full…

• validate_input_attestations

  Verify an artifact's input_attestations[] (ChainGraph Standard §23): per RFC 6901 pointer, checks the attested value resolves inside policy_parameters and its digest binding matches, then verifies each type along its own path -- vc-2.0…

• validate_private_inputs

  Verify an artifact's private_inputs[] (ChainGraph Standard §25 ocg-private-input@1) WITHOUT ever seeing the plaintext witness: per RFC 6901 pointer, checks the pointed value inside policy_parameters IS the declared sha256-salted@1…

• build_disclosure_manifest

  Builds a Merkle-rooted disclosure manifest from a caller-supplied digest list (DATAROOM-1-BUILD-SPEC.md §DR-4) -- the agent hashes files itself and passes {path,size,digest,content_type} entries; the worker never sees file contents. Same…

• verify_disclosure_inclusion

  Proves (or refutes) that a {path,digest} pair was in a disclosure manifest's room (DATAROOM-1-BUILD-SPEC.md §DR-4) -- worker-side mirror of tools/547-disclosure-manifest-verifier.html's single-file inclusion check. Recomputes the…

• suggest_tool_idea

  Builds a prefilled GitHub Issue-Forms URL for proposing a new AINumbers fintech tool, OpenChainGraph compute node, or verifiable workflow. Returns the URL only -- it never posts to GitHub on the caller's behalf. Companion to the site's…

• export_artifact

  Render a verified OpenChainGraph v0.4 artifact into a chaingraph_export profile (OCG Standard §13). Generated downstream of and EXCLUDED from the execution_hash preimage — the export is a view, not a fact; verification always routes back…

• vc_issue

  Composes and signs a W3C Verifiable Credential 2.0 with an eddsa-jcs-2022 Data Integrity proof over a fresh ephemeral did:key (generated per call, not reused). Returns the signed credential, an OCG Standard §23 vc-2.0 input-attestation…

• sdjwt_issue

  Issues a Selective Disclosure JWT (RFC 9901) from a claims object, marking selected top-level claim keys as selectively disclosable via salted-hash digests in the _sd array. Signed EdDSA over a fresh ephemeral did:key (generated per call…

• sdjwt_present

  Builds a redacted presentation from an existing SD-JWT (as returned by sdjwt_issue), keeping only the listed disclosures. Pass aud to add a KB-JWT holder-binding (a fresh ephemeral holder key is generated per call). Pass issuer_did (the…

• checklist_validate_definition

  Validates a checklist or SOP definition JSON against the CHECKRUN-1 schema (definition_id, title, semver version, non-empty steps[] each with step_id/title/instruction/evidence_requirement (none|text|file-digest|attestation)/gate…

• checklist_step_receipt

  Completes ONE step of a checklist/SOP run and returns its OCG v0.4 step receipt: execution_hash chains to prev_step_receipt_digest (pass the previous step's execution_hash, or omit for step 0). A blocking-gate step with…

• checklist_verify_run

  Recomputes and checks a checklist run: every step receipt's execution_hash, the hash-chain link between consecutive steps, and (if a run_receipt is supplied) the §20.1 RFC 6962 Merkle root over every step. Returns valid:true/false…

• ha_record_validate

  Structural (non-cryptographic) §27.2 signed-named-human check: does this record carry a §16 whole-artifact proof (eddsa-jcs-2022) whose verificationMethod is bound to the record's own identity.id? Does NOT verify the signature bytes…

• ha_gate_status

  Given a step's haGatePolicy and the human_accountability_records[] collected for a subject, returns whether the gate is satisfied, held, rejected, escalated, or overridden -- same algorithm as the browser verify.html HA gate card…

• ha_bundle_export

  Assembles a §27.6 haEvidenceBundle from a subject's collected human_accountability_records[] (reviewers, approvers, annotations, exception rationale, timestamps) -- same algorithm as the browser verify.html HA export card…

• intoto_record_chain_run

  Wraps the result of a run_chain call (server/auto compute mode) as standard in-toto links, one per successfully-executed step, plus a generated in-toto layout matching the chain's linear topology (each step MATCHes the previous step's…

• build_evidence_pack

  Composes a session receipt (build_session_receipt logic), an optional §27.6 HA evidence bundle (ha_bundle_export logic, included only when ha_records is supplied and non-empty), and a disclosure manifest (build_disclosure_manifest logic)…

• anchor_stamp

  Calls the anchor-suite MCP server (server-to-server, not the browser CORS-gated relay) to timestamp one execution_hash, or batch-anchor an array via anchor-suite's own anchor_batch (one upstream call per batch, RFC 6962 Merkle root…

• otlp_validate

  Structurally validates an OTLP/JSON trace (resourceSpans -> scopeSpans -> spans: hex traceId/spanId shape, quoted nanosecond timestamps, parent-span references, time ordering) and checks every gen_ai span's attributes against a pinned…

• otlp_span_receipt

  OTLP span/trace to receipt bundle; does NOT build a ChainGraph (use build_chaingraph for that). Three modes, chosen by which input is supplied. (1) Pass `trace` alone to GENERATE a receipt bundle: a per-span receipt (span digest…

• redline_diff

  An agent proposes an edit: diffs original text/markdown against its own revised version and returns the line-level hunks plus a diff receipt (original/revised digests, diff-algorithm declaration, per-hunk digests). Byte-identical to what…

• redline_verify

  Recomputes a redline review from scratch: the diff (from the pasted original+revised text), the diff_receipt's execution_hash, every hunk_receipt's digest/execution_hash/chain-link (in the order supplied -- entries may be minted by an…

• lei_kyb_check

  Fetches an entity's live GLEIF LEI record (api.gleif.org -- the worker's only egress target for this tool, RULINGS-2026-07-19-EGRESS-APEX.md R1) and grades it across six GLEIF data-quality dimensions -- registration status, renewal…

• acdc_said_check

  Agent-facing mirror of the tools/553 browser workbench (VS-1) -- recomputes the self-addressing identifiers (SAIDs) of a pasted ACDC / vLEI credential JSON (top-level "d" plus any nested a/e/r blocks) under the KERI/CESR Blake3-256 ("E")…

• workbook_evaluate

  Feeds a set of A1-style cells (formulas and/or literals) through the SAME headless evaluator the tools/554 browser workbook uses -- topo-sorted dependency graph, ~20 functions (SUM AVG MIN MAX COUNT COUNTIF IF AND OR NOT ROUND ABS CONCAT…

• workbook_range_digest

  Spreadsheet-range digest only; NOT the general artifact emitter (use emit_chaingraph_artifact to wrap arbitrary computation output — this tool's as_artifact mode covers whole-sheet workbook runs only). Evaluates the supplied cells (same…

• workbook_csv_parse

  Parses CSV text with the SAME strict RFC 4180 parser as the tools/554 browser workbook -- quoted fields, embedded quotes/commas/newlines, CRLF -- and REJECTS malformed input rather than repairing it (deterministic beats forgiving for…

• workbook_roundtrip_verify

  Compares a WB-2 Spreadsheet Input Manifest (expected digests) against pasted-back CSV/TSV text per manifest range (observed, e.g. after a recompute in Excel) and returns an XLR-1 round-trip receipt -- `result: "match"|"mismatch"` plus a…

• pain001_validate

  Validates a pain.001.001.09 customer credit transfer initiation XML document against the same hand-derived schema-subset table as the tools/555 browser validator -- structural (mandatory fields), facet (IBAN mod-97, BIC format, ISO 4217…

• camt053_parse

  Parses a camt.053.001 bank-to-customer statement XML document with the same schema-subset structural and facet checks as the tools/565 browser reconciliation workbench (IBAN mod-97, BIC, currency, date/decimal facets), returning the…

• recon_match

  Parses a camt.053.001 statement (same schema-subset checks as camt053_parse) and a counterpart expectation set (CSV, header EndToEndId,Amount,Currency,Date -- same strict RFC 4180 parser as the WORKBOOK-1 CSV tools), then runs the SAME…

The first 60 of 74, as the server listed them.